diff --git a/Puc/v4/Factory.php b/Puc/v4/Factory.php
index 62012076..3ab674c2 100644
--- a/Puc/v4/Factory.php
+++ b/Puc/v4/Factory.php
@@ -1,6 +1,6 @@
 <?php
 if ( !class_exists('Puc_v4_Factory', false) ):
 
-	class Puc_v4_Factory extends Puc_v4p3_Factory { }
+	class Puc_v4_Factory extends Puc_v4p4_Factory { }
 
 endif;
\ No newline at end of file
diff --git a/Puc/v4p3/Autoloader.php b/Puc/v4p4/Autoloader.php
similarity index 94%
rename from Puc/v4p3/Autoloader.php
rename to Puc/v4p4/Autoloader.php
index 258cae04..e435f665 100644
--- a/Puc/v4p3/Autoloader.php
+++ b/Puc/v4p4/Autoloader.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Autoloader', false) ):
+if ( !class_exists('Puc_v4p4_Autoloader', false) ):
 
-	class Puc_v4p3_Autoloader {
+	class Puc_v4p4_Autoloader {
 		private $prefix = '';
 		private $rootDir = '';
 		private $libraryDir = '';
diff --git a/Puc/v4p3/DebugBar/Extension.php b/Puc/v4p4/DebugBar/Extension.php
similarity index 91%
rename from Puc/v4p3/DebugBar/Extension.php
rename to Puc/v4p4/DebugBar/Extension.php
index e49344b5..b816ca9f 100644
--- a/Puc/v4p3/DebugBar/Extension.php
+++ b/Puc/v4p4/DebugBar/Extension.php
@@ -1,12 +1,12 @@
 <?php
-if ( !class_exists('Puc_v4p3_DebugBar_Extension', false) ):
+if ( !class_exists('Puc_v4p4_DebugBar_Extension', false) ):
 
-	class Puc_v4p3_DebugBar_Extension {
+	class Puc_v4p4_DebugBar_Extension {
 		const RESPONSE_BODY_LENGTH_LIMIT = 4000;
 
-		/** @var Puc_v4p3_UpdateChecker */
+		/** @var Puc_v4p4_UpdateChecker */
 		protected $updateChecker;
-		protected $panelClass = 'Puc_v4p3_DebugBar_Panel';
+		protected $panelClass = 'Puc_v4p4_DebugBar_Panel';
 
 		public function __construct($updateChecker, $panelClass = null) {
 			$this->updateChecker = $updateChecker;
@@ -150,11 +150,11 @@ private function getLibraryUrl($filePath) {
 			$absolutePath = realpath(dirname(__FILE__) . '/../../../' . ltrim($filePath, '/'));
 
 			//Where is the library located inside the WordPress directory structure?
-			$absolutePath = Puc_v4p3_Factory::normalizePath($absolutePath);
+			$absolutePath = Puc_v4p4_Factory::normalizePath($absolutePath);
 
-			$pluginDir = Puc_v4p3_Factory::normalizePath(WP_PLUGIN_DIR);
-			$muPluginDir = Puc_v4p3_Factory::normalizePath(WPMU_PLUGIN_DIR);
-			$themeDir = Puc_v4p3_Factory::normalizePath(get_theme_root());
+			$pluginDir = Puc_v4p4_Factory::normalizePath(WP_PLUGIN_DIR);
+			$muPluginDir = Puc_v4p4_Factory::normalizePath(WPMU_PLUGIN_DIR);
+			$themeDir = Puc_v4p4_Factory::normalizePath(get_theme_root());
 
 			if ( (strpos($absolutePath, $pluginDir) === 0) || (strpos($absolutePath, $muPluginDir) === 0) ) {
 				//It's part of a plugin.
diff --git a/Puc/v4p3/DebugBar/Panel.php b/Puc/v4p4/DebugBar/Panel.php
similarity index 96%
rename from Puc/v4p3/DebugBar/Panel.php
rename to Puc/v4p4/DebugBar/Panel.php
index 6a1ebbea..728eb809 100644
--- a/Puc/v4p3/DebugBar/Panel.php
+++ b/Puc/v4p4/DebugBar/Panel.php
@@ -1,9 +1,9 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_DebugBar_Panel', false) && class_exists('Debug_Bar_Panel', false) ):
+if ( !class_exists('Puc_v4p4_DebugBar_Panel', false) && class_exists('Debug_Bar_Panel', false) ):
 
-	class Puc_v4p3_DebugBar_Panel extends Debug_Bar_Panel {
-		/** @var Puc_v4p3_UpdateChecker */
+	class Puc_v4p4_DebugBar_Panel extends Debug_Bar_Panel {
+		/** @var Puc_v4p4_UpdateChecker */
 		protected $updateChecker;
 
 		private $responseBox = '<div class="puc-ajax-response" style="display: none;"></div>';
diff --git a/Puc/v4p3/DebugBar/PluginExtension.php b/Puc/v4p4/DebugBar/PluginExtension.php
similarity index 75%
rename from Puc/v4p3/DebugBar/PluginExtension.php
rename to Puc/v4p4/DebugBar/PluginExtension.php
index f436debf..f8faf33f 100644
--- a/Puc/v4p3/DebugBar/PluginExtension.php
+++ b/Puc/v4p4/DebugBar/PluginExtension.php
@@ -1,12 +1,12 @@
 <?php
-if ( !class_exists('Puc_v4p3_DebugBar_PluginExtension', false) ):
+if ( !class_exists('Puc_v4p4_DebugBar_PluginExtension', false) ):
 
-	class Puc_v4p3_DebugBar_PluginExtension extends Puc_v4p3_DebugBar_Extension {
-		/** @var Puc_v4p3_Plugin_UpdateChecker */
+	class Puc_v4p4_DebugBar_PluginExtension extends Puc_v4p4_DebugBar_Extension {
+		/** @var Puc_v4p4_Plugin_UpdateChecker */
 		protected $updateChecker;
 
 		public function __construct($updateChecker) {
-			parent::__construct($updateChecker, 'Puc_v4p3_DebugBar_PluginPanel');
+			parent::__construct($updateChecker, 'Puc_v4p4_DebugBar_PluginPanel');
 
 			add_action('wp_ajax_puc_v4_debug_request_info', array($this, 'ajaxRequestInfo'));
 		}
diff --git a/Puc/v4p3/DebugBar/PluginPanel.php b/Puc/v4p4/DebugBar/PluginPanel.php
similarity index 82%
rename from Puc/v4p3/DebugBar/PluginPanel.php
rename to Puc/v4p4/DebugBar/PluginPanel.php
index 70da5c4c..aa936e25 100644
--- a/Puc/v4p3/DebugBar/PluginPanel.php
+++ b/Puc/v4p4/DebugBar/PluginPanel.php
@@ -1,10 +1,10 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_DebugBar_PluginPanel', false) ):
+if ( !class_exists('Puc_v4p4_DebugBar_PluginPanel', false) ):
 
-	class Puc_v4p3_DebugBar_PluginPanel extends Puc_v4p3_DebugBar_Panel {
+	class Puc_v4p4_DebugBar_PluginPanel extends Puc_v4p4_DebugBar_Panel {
 		/**
-		 * @var Puc_v4p3_Plugin_UpdateChecker
+		 * @var Puc_v4p4_Plugin_UpdateChecker
 		 */
 		protected $updateChecker;
 
diff --git a/Puc/v4p3/DebugBar/ThemePanel.php b/Puc/v4p4/DebugBar/ThemePanel.php
similarity index 68%
rename from Puc/v4p3/DebugBar/ThemePanel.php
rename to Puc/v4p4/DebugBar/ThemePanel.php
index 6a1dd0d7..6d6a66e0 100644
--- a/Puc/v4p3/DebugBar/ThemePanel.php
+++ b/Puc/v4p4/DebugBar/ThemePanel.php
@@ -1,10 +1,10 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_DebugBar_ThemePanel', false) ):
+if ( !class_exists('Puc_v4p4_DebugBar_ThemePanel', false) ):
 
-	class Puc_v4p3_DebugBar_ThemePanel extends Puc_v4p3_DebugBar_Panel {
+	class Puc_v4p4_DebugBar_ThemePanel extends Puc_v4p4_DebugBar_Panel {
 		/**
-		 * @var Puc_v4p3_Theme_UpdateChecker
+		 * @var Puc_v4p4_Theme_UpdateChecker
 		 */
 		protected $updateChecker;
 
diff --git a/Puc/v4p3/Factory.php b/Puc/v4p4/Factory.php
similarity index 97%
rename from Puc/v4p3/Factory.php
rename to Puc/v4p4/Factory.php
index 1155e8a1..636ce476 100644
--- a/Puc/v4p3/Factory.php
+++ b/Puc/v4p4/Factory.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Factory', false) ):
+if ( !class_exists('Puc_v4p4_Factory', false) ):
 
 	/**
 	 * A factory that builds update checker instances.
@@ -11,7 +11,7 @@
 	 * At the moment it can only build instances of the UpdateChecker class. Other classes are
 	 * intended mainly for internal use and refer directly to specific implementations.
 	 */
-	class Puc_v4p3_Factory {
+	class Puc_v4p4_Factory {
 		protected static $classVersions = array();
 		protected static $sorted = false;
 
@@ -24,7 +24,7 @@ class Puc_v4p3_Factory {
 		 * This method automatically detects if you're using it for a plugin or a theme and chooses
 		 * the appropriate implementation for your update source (JSON file, GitHub, BitBucket, etc).
 		 *
-		 * @see Puc_v4p3_UpdateChecker::__construct
+		 * @see Puc_v4p4_UpdateChecker::__construct
 		 *
 		 * @param string $metadataUrl The URL of the metadata file, a GitHub repository, or another supported update source.
 		 * @param string $fullPath Full path to the main plugin file or to the theme directory.
@@ -32,7 +32,7 @@ class Puc_v4p3_Factory {
 		 * @param int $checkPeriod How often to check for updates (in hours).
 		 * @param string $optionName Where to store book-keeping info about update checks.
 		 * @param string $muPluginFile The plugin filename relative to the mu-plugins directory.
-		 * @return Puc_v4p3_Plugin_UpdateChecker|Puc_v4p3_Theme_UpdateChecker|Puc_v4p3_Vcs_BaseChecker
+		 * @return Puc_v4p4_Plugin_UpdateChecker|Puc_v4p4_Theme_UpdateChecker|Puc_v4p4_Vcs_BaseChecker
 		 */
 		public static function buildUpdateChecker($metadataUrl, $fullPath, $slug = '', $checkPeriod = 12, $optionName = '', $muPluginFile = '') {
 			$fullPath = self::normalizePath($fullPath);
diff --git a/Puc/v4p3/Metadata.php b/Puc/v4p4/Metadata.php
similarity index 97%
rename from Puc/v4p3/Metadata.php
rename to Puc/v4p4/Metadata.php
index ed79438f..40e8ffae 100644
--- a/Puc/v4p3/Metadata.php
+++ b/Puc/v4p4/Metadata.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Metadata', false) ):
+if ( !class_exists('Puc_v4p4_Metadata', false) ):
 
 	/**
 	 * A base container for holding information about updates and plugin metadata.
@@ -8,7 +8,7 @@
 	 * @copyright 2016
 	 * @access public
 	 */
-	abstract class Puc_v4p3_Metadata {
+	abstract class Puc_v4p4_Metadata {
 
 		/**
 		 * Create an instance of this class from a JSON document.
diff --git a/Puc/v4p3/OAuthSignature.php b/Puc/v4p4/OAuthSignature.php
similarity index 96%
rename from Puc/v4p3/OAuthSignature.php
rename to Puc/v4p4/OAuthSignature.php
index 8fe8a5e3..90b16dfa 100644
--- a/Puc/v4p3/OAuthSignature.php
+++ b/Puc/v4p4/OAuthSignature.php
@@ -1,11 +1,11 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_OAuthSignature', false) ):
+if ( !class_exists('Puc_v4p4_OAuthSignature', false) ):
 
 	/**
 	 * A basic signature generator for zero-legged OAuth 1.0.
 	 */
-	class Puc_v4p3_OAuthSignature {
+	class Puc_v4p4_OAuthSignature {
 		private $consumerKey = '';
 		private $consumerSecret = '';
 
diff --git a/Puc/v4p3/Plugin/Info.php b/Puc/v4p4/Plugin/Info.php
similarity index 97%
rename from Puc/v4p3/Plugin/Info.php
rename to Puc/v4p4/Plugin/Info.php
index cfaa411e..21120464 100644
--- a/Puc/v4p3/Plugin/Info.php
+++ b/Puc/v4p4/Plugin/Info.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Plugin_Info', false) ):
+if ( !class_exists('Puc_v4p4_Plugin_Info', false) ):
 
 	/**
 	 * A container class for holding and transforming various plugin metadata.
@@ -8,7 +8,7 @@
 	 * @copyright 2016
 	 * @access public
 	 */
-	class Puc_v4p3_Plugin_Info extends Puc_v4p3_Metadata {
+	class Puc_v4p4_Plugin_Info extends Puc_v4p4_Metadata {
 		//Most fields map directly to the contents of the plugin's info.json file.
 		//See the relevant docs for a description of their meaning.
 		public $name;
diff --git a/Puc/v4p3/Plugin/Update.php b/Puc/v4p4/Plugin/Update.php
similarity index 87%
rename from Puc/v4p3/Plugin/Update.php
rename to Puc/v4p4/Plugin/Update.php
index 7f7d2be0..7b093554 100644
--- a/Puc/v4p3/Plugin/Update.php
+++ b/Puc/v4p4/Plugin/Update.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Plugin_Update', false) ):
+if ( !class_exists('Puc_v4p4_Plugin_Update', false) ):
 
 	/**
 	 * A simple container class for holding information about an available update.
@@ -8,7 +8,7 @@
 	 * @copyright 2016
 	 * @access public
 	 */
-	class Puc_v4p3_Plugin_Update extends Puc_v4p3_Update {
+	class Puc_v4p4_Plugin_Update extends Puc_v4p4_Update {
 		public $id = 0;
 		public $homepage;
 		public $upgrade_notice;
@@ -24,13 +24,13 @@ class Puc_v4p3_Plugin_Update extends Puc_v4p3_Update {
 		 * Create a new instance of PluginUpdate from its JSON-encoded representation.
 		 *
 		 * @param string $json
-		 * @return Puc_v4p3_Plugin_Update|null
+		 * @return Puc_v4p4_Plugin_Update|null
 		 */
 		public static function fromJson($json){
 			//Since update-related information is simply a subset of the full plugin info,
 			//we can parse the update JSON as if it was a plugin info string, then copy over
 			//the parts that we care about.
-			$pluginInfo = Puc_v4p3_Plugin_Info::fromJson($json);
+			$pluginInfo = Puc_v4p4_Plugin_Info::fromJson($json);
 			if ( $pluginInfo !== null ) {
 				return self::fromPluginInfo($pluginInfo);
 			} else {
@@ -42,8 +42,8 @@ public static function fromJson($json){
 		 * Create a new instance of PluginUpdate based on an instance of PluginInfo.
 		 * Basically, this just copies a subset of fields from one object to another.
 		 *
-		 * @param Puc_v4p3_Plugin_Info $info
-		 * @return Puc_v4p3_Plugin_Update
+		 * @param Puc_v4p4_Plugin_Info $info
+		 * @return Puc_v4p4_Plugin_Update
 		 */
 		public static function fromPluginInfo($info){
 			return self::fromObject($info);
@@ -52,8 +52,8 @@ public static function fromPluginInfo($info){
 		/**
 		 * Create a new instance by copying the necessary fields from another object.
 		 *
-		 * @param StdClass|Puc_v4p3_Plugin_Info|Puc_v4p3_Plugin_Update $object The source object.
-		 * @return Puc_v4p3_Plugin_Update The new copy.
+		 * @param StdClass|Puc_v4p4_Plugin_Info|Puc_v4p4_Plugin_Update $object The source object.
+		 * @return Puc_v4p4_Plugin_Update The new copy.
 		 */
 		public static function fromObject($object) {
 			$update = new self();
diff --git a/Puc/v4p3/Plugin/UpdateChecker.php b/Puc/v4p4/Plugin/UpdateChecker.php
similarity index 97%
rename from Puc/v4p3/Plugin/UpdateChecker.php
rename to Puc/v4p4/Plugin/UpdateChecker.php
index c18a6524..865df8e1 100644
--- a/Puc/v4p3/Plugin/UpdateChecker.php
+++ b/Puc/v4p4/Plugin/UpdateChecker.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Plugin_UpdateChecker', false) ):
+if ( !class_exists('Puc_v4p4_Plugin_UpdateChecker', false) ):
 
 	/**
 	 * A custom plugin update checker.
@@ -8,7 +8,7 @@
 	 * @copyright 2016
 	 * @access public
 	 */
-	class Puc_v4p3_Plugin_UpdateChecker extends Puc_v4p3_UpdateChecker {
+	class Puc_v4p4_Plugin_UpdateChecker extends Puc_v4p4_UpdateChecker {
 		protected $updateTransient = 'update_plugins';
 		protected $translationType = 'plugin';
 
@@ -71,10 +71,10 @@ public function __construct($metadataUrl, $pluginFile, $slug = '', $checkPeriod
 		 * Create an instance of the scheduler.
 		 *
 		 * @param int $checkPeriod
-		 * @return Puc_v4p3_Scheduler
+		 * @return Puc_v4p4_Scheduler
 		 */
 		protected function createScheduler($checkPeriod) {
-			$scheduler = new Puc_v4p3_Scheduler($this, $checkPeriod, array('load-plugins.php'));
+			$scheduler = new Puc_v4p4_Scheduler($this, $checkPeriod, array('load-plugins.php'));
 			register_deactivation_hook($this->pluginFile, array($scheduler, 'removeUpdaterCron'));
 			return $scheduler;
 		}
@@ -135,13 +135,13 @@ public function removeHooks() {
 		 * @uses wp_remote_get()
 		 *
 		 * @param array $queryArgs Additional query arguments to append to the request. Optional.
-		 * @return Puc_v4p3_Plugin_Info
+		 * @return Puc_v4p4_Plugin_Info
 		 */
 		public function requestInfo($queryArgs = array()) {
-			list($pluginInfo, $result) = $this->requestMetadata('Puc_v4p3_Plugin_Info', 'request_info', $queryArgs);
+			list($pluginInfo, $result) = $this->requestMetadata('Puc_v4p4_Plugin_Info', 'request_info', $queryArgs);
 
 			if ( $pluginInfo !== null ) {
-				/** @var Puc_v4p3_Plugin_Info $pluginInfo */
+				/** @var Puc_v4p4_Plugin_Info $pluginInfo */
 				$pluginInfo->filename = $this->pluginFile;
 				$pluginInfo->slug = $this->slug;
 			}
@@ -155,7 +155,7 @@ public function requestInfo($queryArgs = array()) {
 		 *
 		 * @uses PluginUpdateChecker::requestInfo()
 		 *
-		 * @return Puc_v4p3_Update|null An instance of Plugin_Update, or NULL when no updates are available.
+		 * @return Puc_v4p4_Update|null An instance of Plugin_Update, or NULL when no updates are available.
 		 */
 		public function requestUpdate() {
 			//For the sake of simplicity, this function just calls requestInfo()
@@ -164,7 +164,7 @@ public function requestUpdate() {
 			if ( $pluginInfo === null ){
 				return null;
 			}
-			$update = Puc_v4p3_Plugin_Update::fromPluginInfo($pluginInfo);
+			$update = Puc_v4p4_Plugin_Update::fromPluginInfo($pluginInfo);
 
 			$update = $this->filterUpdateResult($update);
 
@@ -351,12 +351,12 @@ public function isBeingUpgraded($upgrader = null) {
 		 * Uses cached update data. To retrieve update information straight from
 		 * the metadata URL, call requestUpdate() instead.
 		 *
-		 * @return Puc_v4p3_Plugin_Update|null
+		 * @return Puc_v4p4_Plugin_Update|null
 		 */
 		public function getUpdate() {
 			$update = parent::getUpdate();
 			if ( isset($update) ) {
-				/** @var Puc_v4p3_Plugin_Update $update */
+				/** @var Puc_v4p4_Plugin_Update $update */
 				$update->filename = $this->pluginFile;
 			}
 			return $update;
@@ -733,7 +733,7 @@ public function addResultFilter($callback) {
 		}
 
 		protected function createDebugBarExtension() {
-			return new Puc_v4p3_DebugBar_PluginExtension($this);
+			return new Puc_v4p4_DebugBar_PluginExtension($this);
 		}
 	}
 
diff --git a/Puc/v4p3/Scheduler.php b/Puc/v4p4/Scheduler.php
similarity index 96%
rename from Puc/v4p3/Scheduler.php
rename to Puc/v4p4/Scheduler.php
index df5262dd..4fa1e6db 100644
--- a/Puc/v4p3/Scheduler.php
+++ b/Puc/v4p4/Scheduler.php
@@ -1,11 +1,11 @@
 <?php
-if ( !class_exists('Puc_v4p3_Scheduler', false) ):
+if ( !class_exists('Puc_v4p4_Scheduler', false) ):
 
 	/**
 	 * The scheduler decides when and how often to check for updates.
-	 * It calls @see Puc_v4p3_UpdateChecker::checkForUpdates() to perform the actual checks.
+	 * It calls @see Puc_v4p4_UpdateChecker::checkForUpdates() to perform the actual checks.
 	 */
-	class Puc_v4p3_Scheduler {
+	class Puc_v4p4_Scheduler {
 		public $checkPeriod = 12; //How often to check for updates (in hours).
 		public $throttleRedundantChecks = false; //Check less often if we already know that an update is available.
 		public $throttledCheckPeriod = 72;
@@ -13,7 +13,7 @@ class Puc_v4p3_Scheduler {
 		protected $hourlyCheckHooks = array('load-update.php');
 
 		/**
-		 * @var Puc_v4p3_UpdateChecker
+		 * @var Puc_v4p4_UpdateChecker
 		 */
 		protected $updateChecker;
 
@@ -22,7 +22,7 @@ class Puc_v4p3_Scheduler {
 		/**
 		 * Scheduler constructor.
 		 *
-		 * @param Puc_v4p3_UpdateChecker $updateChecker
+		 * @param Puc_v4p4_UpdateChecker $updateChecker
 		 * @param int $checkPeriod How often to check for updates (in hours).
 		 * @param array $hourlyHooks
 		 */
diff --git a/Puc/v4p3/StateStore.php b/Puc/v4p4/StateStore.php
similarity index 89%
rename from Puc/v4p3/StateStore.php
rename to Puc/v4p4/StateStore.php
index e2348015..fd0d0690 100644
--- a/Puc/v4p3/StateStore.php
+++ b/Puc/v4p4/StateStore.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_StateStore', false) ):
+if ( !class_exists('Puc_v4p4_StateStore', false) ):
 
-	class Puc_v4p3_StateStore {
+	class Puc_v4p4_StateStore {
 		/**
 		 * @var int Last update check timestamp.
 		 */
@@ -14,7 +14,7 @@ class Puc_v4p3_StateStore {
 		protected $checkedVersion = '';
 
 		/**
-		 * @var Puc_v4p3_Update|null Cached update.
+		 * @var Puc_v4p4_Update|null Cached update.
 		 */
 		protected $update = null;
 
@@ -65,7 +65,7 @@ public function setLastCheckToNow() {
 		}
 
 		/**
-		 * @return null|Puc_v4p3_Update
+		 * @return null|Puc_v4p4_Update
 		 */
 		public function getUpdate() {
 			$this->lazyLoad();
@@ -73,10 +73,10 @@ public function getUpdate() {
 		}
 
 		/**
-		 * @param Puc_v4p3_Update|null $update
+		 * @param Puc_v4p4_Update|null $update
 		 * @return $this
 		 */
-		public function setUpdate(Puc_v4p3_Update $update = null) {
+		public function setUpdate(Puc_v4p4_Update $update = null) {
 			$this->lazyLoad();
 			$this->update = $update;
 			return $this;
@@ -138,7 +138,7 @@ public function save() {
 				$updateClass = get_class($this->update);
 				$state->updateClass = $updateClass;
 				$prefix = $this->getLibPrefix();
-				if ( Puc_v4p3_Utils::startsWith($updateClass, $prefix) ) {
+				if ( Puc_v4p4_Utils::startsWith($updateClass, $prefix) ) {
 					$state->updateBaseClass = substr($updateClass, strlen($prefix));
 				}
 			}
@@ -169,8 +169,8 @@ protected function load() {
 				return;
 			}
 
-			$this->lastCheck = intval(Puc_v4p3_Utils::get($state, 'lastCheck', 0));
-			$this->checkedVersion = Puc_v4p3_Utils::get($state, 'checkedVersion', '');
+			$this->lastCheck = intval(Puc_v4p4_Utils::get($state, 'lastCheck', 0));
+			$this->checkedVersion = Puc_v4p4_Utils::get($state, 'checkedVersion', '');
 			$this->update = null;
 
 			if ( isset($state->update) ) {
diff --git a/Puc/v4p3/Theme/Update.php b/Puc/v4p4/Theme/Update.php
similarity index 89%
rename from Puc/v4p3/Theme/Update.php
rename to Puc/v4p4/Theme/Update.php
index eae84ae2..5a43e11b 100644
--- a/Puc/v4p3/Theme/Update.php
+++ b/Puc/v4p4/Theme/Update.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Theme_Update', false) ):
+if ( !class_exists('Puc_v4p4_Theme_Update', false) ):
 
-	class Puc_v4p3_Theme_Update extends Puc_v4p3_Update {
+	class Puc_v4p4_Theme_Update extends Puc_v4p4_Update {
 		public $details_url = '';
 
 		protected static $extraFields = array('details_url');
@@ -44,8 +44,8 @@ public static function fromJson($json) {
 		/**
 		 * Create a new instance by copying the necessary fields from another object.
 		 *
-		 * @param StdClass|Puc_v4p3_Theme_Update $object The source object.
-		 * @return Puc_v4p3_Theme_Update The new copy.
+		 * @param StdClass|Puc_v4p4_Theme_Update $object The source object.
+		 * @return Puc_v4p4_Theme_Update The new copy.
 		 */
 		public static function fromObject($object) {
 			$update = new self();
diff --git a/Puc/v4p3/Theme/UpdateChecker.php b/Puc/v4p4/Theme/UpdateChecker.php
similarity index 91%
rename from Puc/v4p3/Theme/UpdateChecker.php
rename to Puc/v4p4/Theme/UpdateChecker.php
index 5478cabe..48ae5922 100644
--- a/Puc/v4p3/Theme/UpdateChecker.php
+++ b/Puc/v4p4/Theme/UpdateChecker.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Theme_UpdateChecker', false) ):
+if ( !class_exists('Puc_v4p4_Theme_UpdateChecker', false) ):
 
-	class Puc_v4p3_Theme_UpdateChecker extends Puc_v4p3_UpdateChecker {
+	class Puc_v4p4_Theme_UpdateChecker extends Puc_v4p4_UpdateChecker {
 		protected $filterSuffix = 'theme';
 		protected $updateTransient = 'update_themes';
 		protected $translationType = 'theme';
@@ -45,13 +45,13 @@ protected function getUpdateListKey() {
 		/**
 		 * Retrieve the latest update (if any) from the configured API endpoint.
 		 *
-		 * @return Puc_v4p3_Update|null An instance of Update, or NULL when no updates are available.
+		 * @return Puc_v4p4_Update|null An instance of Update, or NULL when no updates are available.
 		 */
 		public function requestUpdate() {
-			list($themeUpdate, $result) = $this->requestMetadata('Puc_v4p3_Theme_Update', 'request_update');
+			list($themeUpdate, $result) = $this->requestMetadata('Puc_v4p4_Theme_Update', 'request_update');
 
 			if ( $themeUpdate !== null ) {
-				/** @var Puc_v4p3_Theme_Update $themeUpdate */
+				/** @var Puc_v4p4_Theme_Update $themeUpdate */
 				$themeUpdate->slug = $this->slug;
 			}
 
@@ -86,10 +86,10 @@ public function getAbsoluteDirectoryPath() {
 		 * Create an instance of the scheduler.
 		 *
 		 * @param int $checkPeriod
-		 * @return Puc_v4p3_Scheduler
+		 * @return Puc_v4p4_Scheduler
 		 */
 		protected function createScheduler($checkPeriod) {
-			return new Puc_v4p3_Scheduler($this, $checkPeriod, array('load-themes.php'));
+			return new Puc_v4p4_Scheduler($this, $checkPeriod, array('load-themes.php'));
 		}
 
 		/**
@@ -103,7 +103,7 @@ public function isBeingUpgraded($upgrader = null) {
 		}
 
 		protected function createDebugBarExtension() {
-			return new Puc_v4p3_DebugBar_Extension($this, 'Puc_v4p3_DebugBar_ThemePanel');
+			return new Puc_v4p4_DebugBar_Extension($this, 'Puc_v4p4_DebugBar_ThemePanel');
 		}
 
 		/**
diff --git a/Puc/v4p3/Update.php b/Puc/v4p4/Update.php
similarity index 84%
rename from Puc/v4p3/Update.php
rename to Puc/v4p4/Update.php
index 9b614837..af66eb28 100644
--- a/Puc/v4p3/Update.php
+++ b/Puc/v4p4/Update.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Update', false) ):
+if ( !class_exists('Puc_v4p4_Update', false) ):
 
 	/**
 	 * A simple container class for holding information about an available update.
@@ -7,7 +7,7 @@
 	 * @author Janis Elsts
 	 * @access public
 	 */
-	abstract class Puc_v4p3_Update extends Puc_v4p3_Metadata {
+	abstract class Puc_v4p4_Update extends Puc_v4p4_Metadata {
 		public $slug;
 		public $version;
 		public $download_url;
diff --git a/Puc/v4p3/UpdateChecker.php b/Puc/v4p4/UpdateChecker.php
similarity index 97%
rename from Puc/v4p3/UpdateChecker.php
rename to Puc/v4p4/UpdateChecker.php
index f4b18357..2eea8781 100644
--- a/Puc/v4p3/UpdateChecker.php
+++ b/Puc/v4p4/UpdateChecker.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_UpdateChecker', false) ):
+if ( !class_exists('Puc_v4p4_UpdateChecker', false) ):
 
-	abstract class Puc_v4p3_UpdateChecker {
+	abstract class Puc_v4p4_UpdateChecker {
 		protected $filterSuffix = '';
 		protected $updateTransient = '';
 		protected $translationType = ''; //"plugin" or "theme".
@@ -36,17 +36,17 @@ abstract class Puc_v4p3_UpdateChecker {
 		public $slug = '';
 
 		/**
-		 * @var Puc_v4p3_Scheduler
+		 * @var Puc_v4p4_Scheduler
 		 */
 		public $scheduler;
 
 		/**
-		 * @var Puc_v4p3_UpgraderStatus
+		 * @var Puc_v4p4_UpgraderStatus
 		 */
 		protected $upgraderStatus;
 
 		/**
-		 * @var Puc_v4p3_StateStore
+		 * @var Puc_v4p4_StateStore
 		 */
 		protected $updateState;
 
@@ -73,8 +73,8 @@ public function __construct($metadataUrl, $directoryName, $slug = null, $checkPe
 			}
 
 			$this->scheduler = $this->createScheduler($checkPeriod);
-			$this->upgraderStatus = new Puc_v4p3_UpgraderStatus();
-			$this->updateState = new Puc_v4p3_StateStore($this->optionName);
+			$this->upgraderStatus = new Puc_v4p4_UpgraderStatus();
+			$this->updateState = new Puc_v4p4_StateStore($this->optionName);
 
 			if ( did_action('init') ) {
 				$this->loadTextDomain();
@@ -199,14 +199,14 @@ public function allowMetadataHost($allow, $host) {
 		 * and substitute their own scheduler.
 		 *
 		 * @param int $checkPeriod
-		 * @return Puc_v4p3_Scheduler
+		 * @return Puc_v4p4_Scheduler
 		 */
 		abstract protected function createScheduler($checkPeriod);
 
 		/**
 		 * Check for updates. The results are stored in the DB option specified in $optionName.
 		 *
-		 * @return Puc_v4p3_Update|null
+		 * @return Puc_v4p4_Update|null
 		 */
 		public function checkForUpdates() {
 			$installedVersion = $this->getInstalledVersion();
@@ -240,7 +240,7 @@ public function checkForUpdates() {
 		/**
 		 * Load the update checker state from the DB.
 		 *
-		 * @return Puc_v4p3_StateStore
+		 * @return Puc_v4p4_StateStore
 		 */
 		public function getUpdateState() {
 			return $this->updateState->lazyLoad();
@@ -265,7 +265,7 @@ public function resetUpdateState() {
 		 * Uses cached update data. To retrieve update information straight from
 		 * the metadata URL, call requestUpdate() instead.
 		 *
-		 * @return Puc_v4p3_Update|null
+		 * @return Puc_v4p4_Update|null
 		 */
 		public function getUpdate() {
 			$update = $this->updateState->getUpdate();
@@ -286,16 +286,16 @@ public function getUpdate() {
 		 *
 		 * Subclasses should run the update through filterUpdateResult before returning it.
 		 *
-		 * @return Puc_v4p3_Update An instance of Update, or NULL when no updates are available.
+		 * @return Puc_v4p4_Update An instance of Update, or NULL when no updates are available.
 		 */
 		abstract public function requestUpdate();
 
 		/**
 		 * Filter the result of a requestUpdate() call.
 		 *
-		 * @param Puc_v4p3_Update|null $update
+		 * @param Puc_v4p4_Update|null $update
 		 * @param array|WP_Error|null $httpResult The value returned by wp_remote_get(), if any.
-		 * @return Puc_v4p3_Update
+		 * @return Puc_v4p4_Update
 		 */
 		protected function filterUpdateResult($update, $httpResult = null) {
 			//Let plugins/themes modify the update.
@@ -494,7 +494,7 @@ protected function shouldShowUpdates() {
 		 * @param string $metaClass Parse the JSON as an instance of this class. It must have a static fromJson method.
 		 * @param string $filterRoot
 		 * @param array $queryArgs Additional query arguments.
-		 * @return array [Puc_v4p3_Metadata|null, array|WP_Error] A metadata instance and the value returned by wp_remote_get().
+		 * @return array [Puc_v4p4_Metadata|null, array|WP_Error] A metadata instance and the value returned by wp_remote_get().
 		 */
 		protected function requestMetadata($metaClass, $filterRoot, $queryArgs = array()) {
 			//Query args to append to the URL. Plugins can add their own by using a filter callback (see addQueryArgFilter()).
@@ -879,13 +879,13 @@ public function maybeInitDebugBar() {
 		}
 
 		protected function createDebugBarExtension() {
-			return new Puc_v4p3_DebugBar_Extension($this);
+			return new Puc_v4p4_DebugBar_Extension($this);
 		}
 
 		/**
 		 * Display additional configuration details in the Debug Bar panel.
 		 *
-		 * @param Puc_v4p3_DebugBar_Panel $panel
+		 * @param Puc_v4p4_DebugBar_Panel $panel
 		 */
 		public function onDisplayConfiguration($panel) {
 			//Do nothing. Subclasses can use this to add additional info to the panel.
diff --git a/Puc/v4p3/UpgraderStatus.php b/Puc/v4p4/UpgraderStatus.php
similarity index 98%
rename from Puc/v4p3/UpgraderStatus.php
rename to Puc/v4p4/UpgraderStatus.php
index 335021ad..14194d8b 100644
--- a/Puc/v4p3/UpgraderStatus.php
+++ b/Puc/v4p4/UpgraderStatus.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_UpgraderStatus', false) ):
+if ( !class_exists('Puc_v4p4_UpgraderStatus', false) ):
 
 	/**
 	 * A utility class that helps figure out which plugin or theme WordPress is upgrading.
@@ -8,7 +8,7 @@
 	 * Core classes like Plugin_Upgrader don't expose the plugin file name during an in-progress update (AFAICT).
 	 * This class uses a few workarounds and heuristics to get the file name.
 	 */
-	class Puc_v4p3_UpgraderStatus {
+	class Puc_v4p4_UpgraderStatus {
 		private $currentType = null; //"plugin" or "theme".
 		private $currentId = null;   //Plugin basename or theme directory name.
 
diff --git a/Puc/v4p3/Utils.php b/Puc/v4p4/Utils.php
similarity index 96%
rename from Puc/v4p3/Utils.php
rename to Puc/v4p4/Utils.php
index 48f7f8ba..9458882a 100644
--- a/Puc/v4p3/Utils.php
+++ b/Puc/v4p4/Utils.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Utils', false) ):
+if ( !class_exists('Puc_v4p4_Utils', false) ):
 
-	class Puc_v4p3_Utils {
+	class Puc_v4p4_Utils {
 		/**
 		 * Get a value from a nested array or object based on a path.
 		 *
diff --git a/Puc/v4p3/Vcs/Api.php b/Puc/v4p4/Vcs/Api.php
similarity index 96%
rename from Puc/v4p3/Vcs/Api.php
rename to Puc/v4p4/Vcs/Api.php
index fed88f26..0972e49a 100644
--- a/Puc/v4p3/Vcs/Api.php
+++ b/Puc/v4p4/Vcs/Api.php
@@ -1,7 +1,7 @@
 <?php
-if ( !class_exists('Puc_v4p3_Vcs_Api') ):
+if ( !class_exists('Puc_v4p4_Vcs_Api') ):
 
-	abstract class Puc_v4p3_Vcs_Api {
+	abstract class Puc_v4p4_Vcs_Api {
 		protected $tagNameProperty = 'name';
 		protected $slug = '';
 
@@ -27,7 +27,7 @@ abstract class Puc_v4p3_Vcs_Api {
 		protected $localDirectory = null;
 
 		/**
-		 * Puc_v4p3_Vcs_Api constructor.
+		 * Puc_v4p4_Vcs_Api constructor.
 		 *
 		 * @param string $repositoryUrl
 		 * @param array|string|null $credentials
@@ -48,7 +48,7 @@ public function getRepositoryUrl() {
 		 * Figure out which reference (i.e tag or branch) contains the latest version.
 		 *
 		 * @param string $configBranch Start looking in this branch.
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		abstract public function chooseReference($configBranch);
 
@@ -105,7 +105,7 @@ public function getLocalReadmeName() {
 		 * Get a branch.
 		 *
 		 * @param string $branchName
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		abstract public function getBranch($branchName);
 
@@ -113,7 +113,7 @@ abstract public function getBranch($branchName);
 		 * Get a specific tag.
 		 *
 		 * @param string $tagName
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		abstract public function getTag($tagName);
 
@@ -121,7 +121,7 @@ abstract public function getTag($tagName);
 		 * Get the tag that looks like the highest version number.
 		 * (Implementations should skip pre-release versions if possible.)
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		abstract public function getLatestTag();
 
diff --git a/Puc/v4p3/Vcs/BaseChecker.php b/Puc/v4p4/Vcs/BaseChecker.php
similarity index 75%
rename from Puc/v4p3/Vcs/BaseChecker.php
rename to Puc/v4p4/Vcs/BaseChecker.php
index de042740..317f17b3 100644
--- a/Puc/v4p3/Vcs/BaseChecker.php
+++ b/Puc/v4p4/Vcs/BaseChecker.php
@@ -1,7 +1,7 @@
 <?php
-if ( !interface_exists('Puc_v4p3_Vcs_BaseChecker', false) ):
+if ( !interface_exists('Puc_v4p4_Vcs_BaseChecker', false) ):
 
-	interface Puc_v4p3_Vcs_BaseChecker {
+	interface Puc_v4p4_Vcs_BaseChecker {
 		/**
 		 * Set the repository branch to use for updates. Defaults to 'master'.
 		 *
@@ -19,7 +19,7 @@ public function setBranch($branch);
 		public function setAuthentication($credentials);
 
 		/**
-		 * @return Puc_v4p3_Vcs_Api
+		 * @return Puc_v4p4_Vcs_Api
 		 */
 		public function getVcsApi();
 	}
diff --git a/Puc/v4p3/Vcs/BitBucketApi.php b/Puc/v4p4/Vcs/BitBucketApi.php
similarity index 92%
rename from Puc/v4p3/Vcs/BitBucketApi.php
rename to Puc/v4p4/Vcs/BitBucketApi.php
index 0a8d811b..412e141a 100644
--- a/Puc/v4p3/Vcs/BitBucketApi.php
+++ b/Puc/v4p4/Vcs/BitBucketApi.php
@@ -1,9 +1,9 @@
 <?php
-if ( !class_exists('Puc_v4p3_Vcs_BitBucketApi', false) ):
+if ( !class_exists('Puc_v4p4_Vcs_BitBucketApi', false) ):
 
-	class Puc_v4p3_Vcs_BitBucketApi extends Puc_v4p3_Vcs_Api {
+	class Puc_v4p4_Vcs_BitBucketApi extends Puc_v4p4_Vcs_Api {
 		/**
-		 * @var Puc_v4p3_OAuthSignature
+		 * @var Puc_v4p4_OAuthSignature
 		 */
 		private $oauth = null;
 
@@ -33,7 +33,7 @@ public function __construct($repositoryUrl, $credentials = array()) {
 		 * Figure out which reference (i.e tag or branch) contains the latest version.
 		 *
 		 * @param string $configBranch Start looking in this branch.
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		public function chooseReference($configBranch) {
 			$updateSource = null;
@@ -59,7 +59,7 @@ public function getBranch($branchName) {
 				return null;
 			}
 
-			return new Puc_v4p3_Vcs_Reference(array(
+			return new Puc_v4p4_Vcs_Reference(array(
 				'name' => $branch->name,
 				'updated' => $branch->target->date,
 				'downloadUrl' => $this->getDownloadUrl($branch->name),
@@ -70,7 +70,7 @@ public function getBranch($branchName) {
 		 * Get a specific tag.
 		 *
 		 * @param string $tagName
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getTag($tagName) {
 			$tag = $this->api('/refs/tags/' . $tagName);
@@ -78,7 +78,7 @@ public function getTag($tagName) {
 				return null;
 			}
 
-			return new Puc_v4p3_Vcs_Reference(array(
+			return new Puc_v4p4_Vcs_Reference(array(
 				'name' => $tag->name,
 				'version' => ltrim($tag->name, 'v'),
 				'updated' => $tag->target->date,
@@ -89,7 +89,7 @@ public function getTag($tagName) {
 		/**
 		 * Get the tag that looks like the highest version number.
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getLatestTag() {
 			$tags = $this->api('/refs/tags?sort=-target.date');
@@ -103,7 +103,7 @@ public function getLatestTag() {
 			//Return the first result.
 			if ( !empty($versionTags) ) {
 				$tag = $versionTags[0];
-				return new Puc_v4p3_Vcs_Reference(array(
+				return new Puc_v4p4_Vcs_Reference(array(
 					'name' => $tag->name,
 					'version' => ltrim($tag->name, 'v'),
 					'updated' => $tag->target->date,
@@ -117,7 +117,7 @@ public function getLatestTag() {
 		 * Get the tag/ref specified by the "Stable tag" header in the readme.txt of a given branch.
 		 *
 		 * @param string $branch
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		protected function getStableTag($branch) {
 			$remoteReadme = $this->getRemoteReadme($branch);
@@ -233,7 +233,7 @@ public function setAuthentication($credentials) {
 			parent::setAuthentication($credentials);
 
 			if ( !empty($credentials) && !empty($credentials['consumer_key']) ) {
-				$this->oauth = new Puc_v4p3_OAuthSignature(
+				$this->oauth = new Puc_v4p4_OAuthSignature(
 					$credentials['consumer_key'],
 					$credentials['consumer_secret']
 				);
diff --git a/Puc/v4p3/Vcs/GitHubApi.php b/Puc/v4p4/Vcs/GitHubApi.php
similarity index 96%
rename from Puc/v4p3/Vcs/GitHubApi.php
rename to Puc/v4p4/Vcs/GitHubApi.php
index 81883a78..e3f1e57d 100644
--- a/Puc/v4p3/Vcs/GitHubApi.php
+++ b/Puc/v4p4/Vcs/GitHubApi.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Vcs_GitHubApi', false) ):
+if ( !class_exists('Puc_v4p4_Vcs_GitHubApi', false) ):
 
-	class Puc_v4p3_Vcs_GitHubApi extends Puc_v4p3_Vcs_Api {
+	class Puc_v4p4_Vcs_GitHubApi extends Puc_v4p4_Vcs_Api {
 		/**
 		 * @var string GitHub username.
 		 */
@@ -52,7 +52,7 @@ public function __construct($repositoryUrl, $accessToken = null) {
 		/**
 		 * Get the latest release from GitHub.
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getLatestRelease() {
 			$release = $this->api('/repos/:user/:repo/releases/latest');
@@ -60,7 +60,7 @@ public function getLatestRelease() {
 				return null;
 			}
 
-			$reference = new Puc_v4p3_Vcs_Reference(array(
+			$reference = new Puc_v4p4_Vcs_Reference(array(
 				'name'        => $release->tag_name,
 				'version'     => ltrim($release->tag_name, 'v'), //Remove the "v" prefix from "v1.2.3".
 				'downloadUrl' => $this->signDownloadUrl($release->zipball_url),
@@ -103,7 +103,7 @@ public function getLatestRelease() {
 		/**
 		 * Get the tag that looks like the highest version number.
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getLatestTag() {
 			$tags = $this->api('/repos/:user/:repo/tags');
@@ -118,7 +118,7 @@ public function getLatestTag() {
 			}
 
 			$tag = $versionTags[0];
-			return new Puc_v4p3_Vcs_Reference(array(
+			return new Puc_v4p4_Vcs_Reference(array(
 				'name'        => $tag->name,
 				'version'     => ltrim($tag->name, 'v'),
 				'downloadUrl' => $this->signDownloadUrl($tag->zipball_url),
@@ -130,7 +130,7 @@ public function getLatestTag() {
 		 * Get a branch by name.
 		 *
 		 * @param string $branchName
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		public function getBranch($branchName) {
 			$branch = $this->api('/repos/:user/:repo/branches/' . $branchName);
@@ -138,7 +138,7 @@ public function getBranch($branchName) {
 				return null;
 			}
 
-			$reference = new Puc_v4p3_Vcs_Reference(array(
+			$reference = new Puc_v4p4_Vcs_Reference(array(
 				'name'        => $branch->name,
 				'downloadUrl' => $this->buildArchiveDownloadUrl($branch->name),
 				'apiResponse' => $branch,
@@ -290,7 +290,7 @@ public function buildArchiveDownloadUrl($ref = 'master') {
 		 * Get a specific tag.
 		 *
 		 * @param string $tagName
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getTag($tagName) {
 			//The current GitHub update checker doesn't use getTag, so I didn't bother to implement it.
@@ -306,7 +306,7 @@ public function setAuthentication($credentials) {
 		 * Figure out which reference (i.e tag or branch) contains the latest version.
 		 *
 		 * @param string $configBranch Start looking in this branch.
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		public function chooseReference($configBranch) {
 			$updateSource = null;
diff --git a/Puc/v4p3/Vcs/GitLabApi.php b/Puc/v4p4/Vcs/GitLabApi.php
similarity index 94%
rename from Puc/v4p3/Vcs/GitLabApi.php
rename to Puc/v4p4/Vcs/GitLabApi.php
index a516e231..574c309c 100644
--- a/Puc/v4p3/Vcs/GitLabApi.php
+++ b/Puc/v4p4/Vcs/GitLabApi.php
@@ -1,8 +1,8 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Vcs_GitLabApi', false) ):
+if ( !class_exists('Puc_v4p4_Vcs_GitLabApi', false) ):
 
-	class Puc_v4p3_Vcs_GitLabApi extends Puc_v4p3_Vcs_Api {
+	class Puc_v4p4_Vcs_GitLabApi extends Puc_v4p4_Vcs_Api {
 		/**
 		 * @var string GitLab username.
 		 */
@@ -57,7 +57,7 @@ public function __construct($repositoryUrl, $accessToken = null) {
 		/**
 		 * Get the latest release from GitLab.
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getLatestRelease() {
 			return $this->getLatestTag();
@@ -66,7 +66,7 @@ public function getLatestRelease() {
 		/**
 		 * Get the tag that looks like the highest version number.
 		 *
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getLatestTag() {
 			$tags = $this->api('/:user/:repo/repository/tags');
@@ -80,7 +80,7 @@ public function getLatestTag() {
 			}
 
 			$tag = $versionTags[0];
-			return new Puc_v4p3_Vcs_Reference(array(
+			return new Puc_v4p4_Vcs_Reference(array(
 				'name' => $tag->name,
 				'version' => ltrim($tag->name, 'v'),
 				'downloadUrl' => $this->buildArchiveDownloadUrl($tag->name),
@@ -92,7 +92,7 @@ public function getLatestTag() {
 		 * Get a branch by name.
 		 *
 		 * @param string $branchName
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		public function getBranch($branchName) {
 			$branch = $this->api('/:user/:repo/repository/branches/' . $branchName);
@@ -100,7 +100,7 @@ public function getBranch($branchName) {
 				return null;
 			}
 
-			$reference = new Puc_v4p3_Vcs_Reference(array(
+			$reference = new Puc_v4p4_Vcs_Reference(array(
 				'name' => $branch->name,
 				'downloadUrl' => $this->buildArchiveDownloadUrl($branch->name),
 				'apiResponse' => $branch,
@@ -238,7 +238,7 @@ public function buildArchiveDownloadUrl($ref = 'master') {
 		 * Get a specific tag.
 		 *
 		 * @param string $tagName
-		 * @return Puc_v4p3_Vcs_Reference|null
+		 * @return Puc_v4p4_Vcs_Reference|null
 		 */
 		public function getTag($tagName) {
 			throw new LogicException('The ' . __METHOD__ . ' method is not implemented and should not be used.');
@@ -248,7 +248,7 @@ public function getTag($tagName) {
 		 * Figure out which reference (i.e tag or branch) contains the latest version.
 		 *
 		 * @param string $configBranch Start looking in this branch.
-		 * @return null|Puc_v4p3_Vcs_Reference
+		 * @return null|Puc_v4p4_Vcs_Reference
 		 */
 		public function chooseReference($configBranch) {
 			$updateSource = null;
diff --git a/Puc/v4p3/Vcs/PluginUpdateChecker.php b/Puc/v4p4/Vcs/PluginUpdateChecker.php
similarity index 93%
rename from Puc/v4p3/Vcs/PluginUpdateChecker.php
rename to Puc/v4p4/Vcs/PluginUpdateChecker.php
index 7aa76016..3b96e814 100644
--- a/Puc/v4p3/Vcs/PluginUpdateChecker.php
+++ b/Puc/v4p4/Vcs/PluginUpdateChecker.php
@@ -1,21 +1,21 @@
 <?php
-if ( !class_exists('Puc_v4p3_Vcs_PluginUpdateChecker') ):
+if ( !class_exists('Puc_v4p4_Vcs_PluginUpdateChecker') ):
 
-	class Puc_v4p3_Vcs_PluginUpdateChecker extends Puc_v4p3_Plugin_UpdateChecker implements Puc_v4p3_Vcs_BaseChecker {
+	class Puc_v4p4_Vcs_PluginUpdateChecker extends Puc_v4p4_Plugin_UpdateChecker implements Puc_v4p4_Vcs_BaseChecker {
 		/**
 		 * @var string The branch where to look for updates. Defaults to "master".
 		 */
 		protected $branch = 'master';
 
 		/**
-		 * @var Puc_v4p3_Vcs_Api Repository API client.
+		 * @var Puc_v4p4_Vcs_Api Repository API client.
 		 */
 		protected $api = null;
 
 		/**
-		 * Puc_v4p3_Vcs_PluginUpdateChecker constructor.
+		 * Puc_v4p4_Vcs_PluginUpdateChecker constructor.
 		 *
-		 * @param Puc_v4p3_Vcs_Api $api
+		 * @param Puc_v4p4_Vcs_Api $api
 		 * @param string $pluginFile
 		 * @param string $slug
 		 * @param int $checkPeriod
@@ -41,7 +41,7 @@ public function requestInfo($unusedParameter = null) {
 			$api = $this->api;
 			$api->setLocalDirectory($this->getAbsoluteDirectoryPath());
 
-			$info = new Puc_v4p3_Plugin_Info();
+			$info = new Puc_v4p4_Plugin_Info();
 			$info->filename = $this->pluginFile;
 			$info->slug = $this->slug;
 
@@ -128,7 +128,7 @@ protected function readmeTxtExistsLocally() {
 		 * Copy plugin metadata from a file header to a Plugin Info object.
 		 *
 		 * @param array $fileHeader
-		 * @param Puc_v4p3_Plugin_Info $pluginInfo
+		 * @param Puc_v4p4_Plugin_Info $pluginInfo
 		 */
 		protected function setInfoFromHeader($fileHeader, $pluginInfo) {
 			$headerToPropertyMap = array(
@@ -159,7 +159,7 @@ protected function setInfoFromHeader($fileHeader, $pluginInfo) {
 		 * Copy plugin metadata from the remote readme.txt file.
 		 *
 		 * @param string $ref GitHub tag or branch where to look for the readme.
-		 * @param Puc_v4p3_Plugin_Info $pluginInfo
+		 * @param Puc_v4p4_Plugin_Info $pluginInfo
 		 */
 		protected function setInfoFromRemoteReadme($ref, $pluginInfo) {
 			$readme = $this->api->getRemoteReadme($ref);
diff --git a/Puc/v4p3/Vcs/Reference.php b/Puc/v4p4/Vcs/Reference.php
similarity index 92%
rename from Puc/v4p3/Vcs/Reference.php
rename to Puc/v4p4/Vcs/Reference.php
index 6a15f6ca..8a708770 100644
--- a/Puc/v4p3/Vcs/Reference.php
+++ b/Puc/v4p4/Vcs/Reference.php
@@ -1,5 +1,5 @@
 <?php
-if ( !class_exists('Puc_v4p3_Vcs_Reference', false) ):
+if ( !class_exists('Puc_v4p4_Vcs_Reference', false) ):
 
 	/**
 	 * This class represents a VCS branch or tag. It's intended as a read only, short-lived container
@@ -13,7 +13,7 @@
 	 * @property string|null $changelog
 	 * @property int|null $downloadCount
 	 */
-	class Puc_v4p3_Vcs_Reference {
+	class Puc_v4p4_Vcs_Reference {
 		private $properties = array();
 
 		public function __construct($properties = array()) {
diff --git a/Puc/v4p3/Vcs/ThemeUpdateChecker.php b/Puc/v4p4/Vcs/ThemeUpdateChecker.php
similarity index 85%
rename from Puc/v4p3/Vcs/ThemeUpdateChecker.php
rename to Puc/v4p4/Vcs/ThemeUpdateChecker.php
index 078822e1..fb31cb12 100644
--- a/Puc/v4p3/Vcs/ThemeUpdateChecker.php
+++ b/Puc/v4p4/Vcs/ThemeUpdateChecker.php
@@ -1,22 +1,22 @@
 <?php
 
-if ( !class_exists('Puc_v4p3_Vcs_ThemeUpdateChecker', false) ):
+if ( !class_exists('Puc_v4p4_Vcs_ThemeUpdateChecker', false) ):
 
-	class Puc_v4p3_Vcs_ThemeUpdateChecker extends Puc_v4p3_Theme_UpdateChecker implements Puc_v4p3_Vcs_BaseChecker {
+	class Puc_v4p4_Vcs_ThemeUpdateChecker extends Puc_v4p4_Theme_UpdateChecker implements Puc_v4p4_Vcs_BaseChecker {
 		/**
 		 * @var string The branch where to look for updates. Defaults to "master".
 		 */
 		protected $branch = 'master';
 
 		/**
-		 * @var Puc_v4p3_Vcs_Api Repository API client.
+		 * @var Puc_v4p4_Vcs_Api Repository API client.
 		 */
 		protected $api = null;
 
 		/**
-		 * Puc_v4p3_Vcs_ThemeUpdateChecker constructor.
+		 * Puc_v4p4_Vcs_ThemeUpdateChecker constructor.
 		 *
-		 * @param Puc_v4p3_Vcs_Api $api
+		 * @param Puc_v4p4_Vcs_Api $api
 		 * @param null $stylesheet
 		 * @param null $customSlug
 		 * @param int $checkPeriod
@@ -35,7 +35,7 @@ public function requestUpdate() {
 			$api = $this->api;
 			$api->setLocalDirectory($this->getAbsoluteDirectoryPath());
 
-			$update = new Puc_v4p3_Theme_Update();
+			$update = new Puc_v4p4_Theme_Update();
 			$update->slug = $this->slug;
 
 			//Figure out which reference (tag or branch) we'll use to get the latest version of the theme.
@@ -60,13 +60,13 @@ public function requestUpdate() {
 			//Get headers from the main stylesheet in this branch/tag. Its "Version" header and other metadata
 			//are what the WordPress install will actually see after upgrading, so they take precedence over releases/tags.
 			$remoteHeader = $this->getFileHeader($api->getRemoteFile('style.css', $ref));
-			$update->version = Puc_v4p3_Utils::findNotEmpty(array(
+			$update->version = Puc_v4p4_Utils::findNotEmpty(array(
 				$remoteHeader['Version'],
-				Puc_v4p3_Utils::get($updateSource, 'version'),
+				Puc_v4p4_Utils::get($updateSource, 'version'),
 			));
 
 			//The details URL defaults to the Theme URI header or the repository URL.
-			$update->details_url = Puc_v4p3_Utils::findNotEmpty(array(
+			$update->details_url = Puc_v4p4_Utils::findNotEmpty(array(
 				$remoteHeader['ThemeURI'],
 				$this->theme->get('ThemeURI'),
 				$this->metadataUrl,
diff --git a/README.md b/README.md
index 06a06da6..212a99cd 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ Getting Started
 
 	```php
 	require 'path/to/plugin-update-checker/plugin-update-checker.php';
-	$myUpdateChecker = Puc_v4p3_Factory::buildUpdateChecker(
+	$myUpdateChecker = Puc_v4_Factory::buildUpdateChecker(
 		'http://example.com/path/to/details.json',
 		__FILE__,
 		'unique-plugin-or-theme-slug'
@@ -93,7 +93,7 @@ By default, the library will check the specified URL for changes every 12 hours.
 
 	```php
 	require 'plugin-update-checker/plugin-update-checker.php';
-	$myUpdateChecker = Puc_v4p3_Factory::buildUpdateChecker(
+	$myUpdateChecker = Puc_v4_Factory::buildUpdateChecker(
 		'https://github.com/user-name/repo-name/',
 		__FILE__,
 		'unique-plugin-or-theme-slug'
@@ -167,7 +167,7 @@ The library will pull update details from the following parts of a release/tag/b
 
 	```php
 	require 'plugin-update-checker/plugin-update-checker.php';
-	$myUpdateChecker = Puc_v4p3_Factory::buildUpdateChecker(
+	$myUpdateChecker = Puc_v4_Factory::buildUpdateChecker(
 		'https://bitbucket.org/user-name/repo-name',
 		__FILE__,
 		'unique-plugin-or-theme-slug'
@@ -223,15 +223,15 @@ BitBucket doesn't have an equivalent to GitHub's releases, so the process is sli
 
 	```php
 	require 'plugin-update-checker/plugin-update-checker.php';
-	$myUpdateChecker = Puc_v4p3_Factory::buildUpdateChecker(
+	$myUpdateChecker = Puc_v4_Factory::buildUpdateChecker(
 		'https://gitlab.com/user-name/repo-name/',
 		__FILE__,
 		'unique-plugin-or-theme-slug'
 	);
 
 	//Note: Self-hosted instances of GitLab must be initialized like this:
-	$myUpdateChecker = new Puc_v4p3_Vcs_PluginUpdateChecker(
-		new Puc_v4p3_Vcs_GitLabApi('https://myserver.com/user-name/repo-name/'),
+	$myUpdateChecker = new Puc_v4_Vcs_PluginUpdateChecker(
+		new Puc_v4p4_Vcs_GitLabApi('https://myserver.com/user-name/repo-name/'),
 		__FILE__,
 		'unique-plugin-or-theme-slug'
 	);
diff --git a/plugin-update-checker.php b/plugin-update-checker.php
index 9adb4ef4..a0fef190 100644
--- a/plugin-update-checker.php
+++ b/plugin-update-checker.php
@@ -1,24 +1,24 @@
 <?php
 /**
- * Plugin Update Checker Library 4.3
+ * Plugin Update Checker Library 4.4
  * http://w-shadow.com/
  * 
  * Copyright 2017 Janis Elsts
  * Released under the MIT license. See license.txt for details.
  */
 
-require dirname(__FILE__) . '/Puc/v4p3/Factory.php';
+require dirname(__FILE__) . '/Puc/v4p4/Factory.php';
 require dirname(__FILE__) . '/Puc/v4/Factory.php';
-require dirname(__FILE__) . '/Puc/v4p3/Autoloader.php';
-new Puc_v4p3_Autoloader();
+require dirname(__FILE__) . '/Puc/v4p4/Autoloader.php';
+new Puc_v4p4_Autoloader();
 
 //Register classes defined in this file with the factory.
-Puc_v4p3_Factory::addVersion('Plugin_UpdateChecker', 'Puc_v4p3_Plugin_UpdateChecker', '4.3');
-Puc_v4p3_Factory::addVersion('Theme_UpdateChecker', 'Puc_v4p3_Theme_UpdateChecker', '4.3');
+Puc_v4_Factory::addVersion('Plugin_UpdateChecker', 'Puc_v4p4_Plugin_UpdateChecker', '4.4');
+Puc_v4_Factory::addVersion('Theme_UpdateChecker', 'Puc_v4p4_Theme_UpdateChecker', '4.4');
 
-Puc_v4p3_Factory::addVersion('Vcs_PluginUpdateChecker', 'Puc_v4p3_Vcs_PluginUpdateChecker', '4.3');
-Puc_v4p3_Factory::addVersion('Vcs_ThemeUpdateChecker', 'Puc_v4p3_Vcs_ThemeUpdateChecker', '4.3');
+Puc_v4_Factory::addVersion('Vcs_PluginUpdateChecker', 'Puc_v4p4_Vcs_PluginUpdateChecker', '4.4');
+Puc_v4_Factory::addVersion('Vcs_ThemeUpdateChecker', 'Puc_v4p4_Vcs_ThemeUpdateChecker', '4.4');
 
-Puc_v4p3_Factory::addVersion('GitHubApi', 'Puc_v4p3_Vcs_GitHubApi', '4.3');
-Puc_v4p3_Factory::addVersion('BitBucketApi', 'Puc_v4p3_Vcs_BitBucketApi', '4.3');
-Puc_v4p3_Factory::addVersion('GitLabApi', 'Puc_v4p3_Vcs_GitLabApi', '4.3');
\ No newline at end of file
+Puc_v4_Factory::addVersion('GitHubApi', 'Puc_v4p4_Vcs_GitHubApi', '4.4');
+Puc_v4_Factory::addVersion('BitBucketApi', 'Puc_v4p4_Vcs_BitBucketApi', '4.4');
+Puc_v4_Factory::addVersion('GitLabApi', 'Puc_v4p4_Vcs_GitLabApi', '4.4');
\ No newline at end of file