diff --git a/Adapter/GD.php b/Adapter/GD.php
index 34c301c..c0a1f15 100644
--- a/Adapter/GD.php
+++ b/Adapter/GD.php
@@ -4,6 +4,7 @@
 
 use Gregwar\Image\Image;
 use Gregwar\Image\ImageColor;
+use Gregwar\Image\Utils\FileUtils;
 
 class GD extends Common
 {
@@ -609,7 +610,7 @@ public function saveJpeg($file, $quality)
      */
     protected function openJpeg($file)
     {
-        if (file_exists($file) && filesize($file)) {
+        if (FileUtils::safeExists($file) && filesize($file)) {
             $this->resource = @imagecreatefromjpeg($file);
         } else {
             $this->resource = false;
@@ -621,7 +622,7 @@ protected function openJpeg($file)
      */
     protected function openGif($file)
     {
-        if (file_exists($file) && filesize($file)) {
+        if (FileUtils::safeExists($file) && filesize($file)) {
             $this->resource = @imagecreatefromgif($file);
         } else {
             $this->resource = false;
@@ -633,7 +634,7 @@ protected function openGif($file)
      */
     protected function openPng($file)
     {
-        if (file_exists($file) && filesize($file)) {
+        if (FileUtils::safeExists($file) && filesize($file)) {
             $this->resource = @imagecreatefrompng($file);
         } else {
             $this->resource = false;
@@ -645,7 +646,7 @@ protected function openPng($file)
      */
     protected function openWebp($file)
     {
-        if (file_exists($file) && filesize($file)) {
+        if (FileUtils::safeExists($file) && filesize($file)) {
             $this->resource = @imagecreatefromwebp($file);
         } else {
             $this->resource = false;
diff --git a/Source/File.php b/Source/File.php
index ceed26b..d580891 100644
--- a/Source/File.php
+++ b/Source/File.php
@@ -3,6 +3,7 @@
 namespace Gregwar\Image\Source;
 
 use Gregwar\Image\Image;
+use Gregwar\Image\Utils\FileUtils;
 
 /**
  * Open an image from a file.
@@ -28,7 +29,7 @@ public function correct()
 
     public function guessType()
     {
-        if (function_exists('exif_imagetype')) {
+        if (function_exists('exif_imagetype') && FileUtils::safeExists($this->file)) {
             $type = @exif_imagetype($this->file);
 
             if (false !== $type) {
diff --git a/Utils/FileUtils.php b/Utils/FileUtils.php
new file mode 100644
index 0000000..376a425
--- /dev/null
+++ b/Utils/FileUtils.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Gregwar\Image\Utils;
+
+class FileUtils
+{
+    /**
+     * Checks that the file exists and is not a phar archive
+     */
+    public static function safeExists($file)
+    {
+        return file_exists($file) && !self::isPhar($file);
+    }
+
+    /**
+     * Checks if the file is a phar archive
+     */
+    public static function isPhar($file)
+    {
+        return substr(strtolower($file), 0, 7) === 'phar://';
+    }
+}