diff --git a/.travis.yml b/.travis.yml
index a7b9a03..adffa71 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,6 @@
 language: php
 
 php:
-  - 5.6
-  - 7.0
-  - 7.1
   - 7.2
   - 7.3
 
@@ -11,19 +8,13 @@ matrix:
   fast_finish: true
 
   include:
-    - php: 5.6
-      env: dependencies=lowest
-    - php: 7.0
-      env: dependencies=lowest
-    - php: 7.1
-      env: dependencies=lowest
     - php: 7.2
       env: dependencies=lowest
     - php: 7.3
       env: dependencies=lowest
-    - php: 7.0
+    - php: 7.2
       env: PHPCS=1
-    - php: 7.0
+    - php: 7.2
       env: COVERAGE=1
 
 install:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5f3cff..207be97 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # 1.x branch
+## 1.1 branch
+### 1.1.0
+* updated for `cakephp` 4 and `phpunit` 8.
+
 ## 1.0 branch
 ### 1.0.8
 * APIs are now generated by `phpDocumentor` and no longer by` apigen`.
diff --git a/README.md b/README.md
index 67d8212..d212238 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![Build Status](https://api.travis-ci.org/mirko-pagliai/cakephp-link-scanner.svg?branch=master)](https://travis-ci.org/mirko-pagliai/cakephp-link-scanner)
 [![Build status](https://ci.appveyor.com/api/projects/status/hqk7fxtad6r75wk3?svg=true)](https://ci.appveyor.com/project/mirko-pagliai/cakephp-link-scanner)
 [![codecov](https://codecov.io/gh/mirko-pagliai/cakephp-link-scanner/branch/master/graph/badge.svg)](https://codecov.io/gh/mirko-pagliai/cakephp-link-scanner)
-[![CodeFactor](https://www.codefactor.io/repository/github/mirko-pagliai/cakephp-link-scanner/badge/cakephp4)](https://www.codefactor.io/repository/github/mirko-pagliai/cakephp-link-scanner/overview/cakephp4)
+[![CodeFactor](https://www.codefactor.io/repository/github/mirko-pagliai/cakephp-link-scanner/badge)](https://www.codefactor.io/repository/github/mirko-pagliai/cakephp-link-scanner)
 
 *LinkScanner* is a CakePHP plugin for recursively scanning links: starting from
 a full base url, it performs GET requests, checks the status codes, inspects the
@@ -13,7 +13,7 @@ response bodies and, if it finds other links, it continues recursively scanning.
 ![gif of terminal](https://github.com/mirko-pagliai/cakephp-link-scanner/raw/master/docs/tty.gif)
 
 Did you like this plugin? Its development requires a lot of time for me.
-Please consider the possibility of making [a donation](//paypal.me/mirkopagliai):  
+Please consider the possibility of making [a donation](//paypal.me/mirkopagliai):
 even a coffee is enough! Thank you.
 
 [![Make a donation](https://www.paypalobjects.com/webstatic/mktg/logo-center/logo_paypal_carte.jpg)](//paypal.me/mirkopagliai)
@@ -24,10 +24,19 @@ You can install the plugin via composer:
 $ composer require --prefer-dist mirko-pagliai/cakephp-link-scanner
 ```
 
-**NOTE: the latest version available requires at least CakePHP 3.7.1**.
-    
+**NOTE: the latest version available requires at least CakePHP 4**.
+
+Instead, the [cakephp3](//github.com/mirko-pagliai/cakephp-link-scanner/tree/cakephp3)
+branch is compatible with all previous versions of CakePHP from version 3.7.1.
+This branch coincides with the current version of *cakephp-link-scanner*.
+
+In this case, you can install the package as well:
+
+```bash
+$ composer require --prefer-dist mirko-pagliai/cakephp-link-scanner:dev-cakephp3
+
 Then you have to load the plugin. For more information on how to load the plugin,
-please refer to the [Cookbook](//book.cakephp.org/3.0/en/plugins.html#loading-a-plugin).
+please refer to the [Cookbook](//book.cakephp.org/4.0/en/plugins.html#loading-a-plugin).
 
 Simply, you can execute the shell command to enable the plugin:
 ```bash
@@ -37,7 +46,7 @@ This would update your application's bootstrap method.
 
 ## Configuration
 It's not essential, but it may be useful to set the `App.fullBaseUrl` value
-correctly [refer to the Cookbook](//book.cakephp.org/3.0/en/development/configuration.html#general-configuration),
+correctly [refer to the Cookbook](//book.cakephp.org/4.0/en/development/configuration.html#general-configuration),
 especially if you plan to use the plugin mainly on your app, so as not to have
 to indicate the full base url which to start the scan every time.
 
@@ -54,6 +63,6 @@ In addition, you can refer to our [API](//mirko-pagliai.github.io/cakephp-link-s
 *   allow to export results as html and/or xml.
 
 ## Versioning
-For transparency and insight into our release cycle and to maintain backward 
-compatibility, *Assets* will be maintained under the 
+For transparency and insight into our release cycle and to maintain backward
+compatibility, *Assets* will be maintained under the
 [Semantic Versioning guidelines](//semver.org).
diff --git a/composer.json b/composer.json
index 38b6e0b..5f7580b 100644
--- a/composer.json
+++ b/composer.json
@@ -5,18 +5,18 @@
     "type": "cakephp-plugin",
     "license": "MIT",
     "authors": [{
-        "name": "Mirko Pagliai",
-        "email": "mirko.pagliai@gmail.com"
-    }],
+            "name": "Mirko Pagliai",
+            "email": "mirko.pagliai@gmail.com"
+        }],
     "require": {
-        "php": ">=5.5.9",
-        "cakephp/cakephp": "^3.7.1",
-        "mirko-pagliai/me-tools": "^2.18.9",
-        "mirko-pagliai/php-tools": "^1.2.6"
+        "php": ">=7.2",
+        "cakephp/cakephp": "^4.0",
+        "mirko-pagliai/me-tools": "^2.19",
+        "mirko-pagliai/php-tools": "^1.3"
     },
     "require-dev": {
-        "cakephp/cakephp-codesniffer": "^3.0",
-        "phpunit/phpunit": "^5.7.14|^6.0"
+        "cakephp/cakephp-codesniffer": "^4.0",
+        "phpunit/phpunit": "^8.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index 5cc1928..2bb84c4 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -4,4 +4,11 @@
     <file>.</file>
 
     <rule ref="./vendor/mirko-pagliai/php-tools/sniffer-ruleset.xml"/>
+
+    <rule ref="SlevomatCodingStandard.Namespaces.UnusedUses.UnusedUse">
+        <exclude-pattern>/tests/test_app/TestApp/Template/Error/error500.php</exclude-pattern>
+    </rule>
+    <rule ref="SlevomatCodingStandard.Namespaces.UseFromSameNamespace.UseFromSameNamespace">
+        <severity>0</severity>
+    </rule>
 </ruleset>
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 4428ddc..3e890ad 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -3,7 +3,6 @@
 	colors="true"
 	processIsolation="false"
 	stopOnFailure="false"
-	syntaxCheck="false"
 	bootstrap="./tests/bootstrap.php"
 	>
 
diff --git a/src/Command/LinkScannerCommand.php b/src/Command/LinkScannerCommand.php
index 0d21c1d..8754d78 100644
--- a/src/Command/LinkScannerCommand.php
+++ b/src/Command/LinkScannerCommand.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -36,7 +37,7 @@ class LinkScannerCommand extends Command
      * @return void
      * @uses $LinkScanner
      */
-    public function initialize()
+    public function initialize(): void
     {
         $this->LinkScanner = $this->LinkScanner ?: new LinkScanner();
     }
@@ -49,7 +50,7 @@ public function initialize()
      * @see LinkScannerCommandEventListener::implementedEvents()
      * @uses $LinkScanner
      */
-    public function execute(Arguments $args, ConsoleIo $io)
+    public function execute(Arguments $args, ConsoleIo $io): ?int
     {
         try {
             //Will trigger events provided by `LinkScannerCommandEventListener`
@@ -96,7 +97,7 @@ public function execute(Arguments $args, ConsoleIo $io)
      * @return \Cake\Console\ConsoleOptionParser The built parser
      * @uses $LinkScanner
      */
-    protected function buildOptionParser(ConsoleOptionParser $parser)
+    protected function buildOptionParser(ConsoleOptionParser $parser): ConsoleOptionParser
     {
         $parser->setDescription(__d('link-scanner', 'Performs a complete scan'));
 
diff --git a/src/Event/LinkScannerCommandEventListener.php b/src/Event/LinkScannerCommandEventListener.php
index 550c7be..607c355 100644
--- a/src/Event/LinkScannerCommandEventListener.php
+++ b/src/Event/LinkScannerCommandEventListener.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -59,7 +60,7 @@ public function __construct(Arguments $args, ConsoleIo $io)
      *  associated with the respective event
      * @return array
      */
-    public function implementedEvents()
+    public function implementedEvents(): array
     {
         $events = [
             'afterScanUrl',
@@ -71,7 +72,7 @@ public function implementedEvents()
             'scanStarted',
         ];
 
-        return array_combine(array_map(function ($event) {
+        return array_combine(array_map(function (string $event) {
             return 'LinkScanner.' . $event;
         }, $events), $events);
     }
@@ -84,7 +85,7 @@ public function implementedEvents()
      * @uses $args
      * @uses $io
      */
-    public function afterScanUrl(Event $event, Response $response)
+    public function afterScanUrl(Event $event, Response $response): bool
     {
         if (!$this->args->getOption('verbose')) {
             return true;
@@ -104,7 +105,7 @@ public function afterScanUrl(Event $event, Response $response)
      * @return bool
      * @uses $io
      */
-    public function beforeScanUrl(Event $event, $url)
+    public function beforeScanUrl(Event $event, string $url): bool
     {
         $this->io->verbose(__d('link-scanner', 'Checking {0} ...', $url), 0);
 
@@ -118,7 +119,7 @@ public function beforeScanUrl(Event $event, $url)
      * @return bool
      * @uses $io
      */
-    public function foundLinkToBeScanned(Event $event, $link)
+    public function foundLinkToBeScanned(Event $event, string $link): bool
     {
         $this->io->verbose(__d('link-scanner', 'Link found: {0}', $link));
 
@@ -132,7 +133,7 @@ public function foundLinkToBeScanned(Event $event, $link)
      * @return bool
      * @uses $io
      */
-    public function foundRedirect(Event $event, $url)
+    public function foundRedirect(Event $event, string $url): bool
     {
         $this->io->verbose(__d('link-scanner', 'Redirect found: {0}', $url));
 
@@ -146,7 +147,7 @@ public function foundRedirect(Event $event, $url)
      * @return bool
      * @uses $io
      */
-    public function resultsExported(Event $event, $filename)
+    public function resultsExported(Event $event, string $filename): bool
     {
         $this->io->success(__d('link-scanner', 'Results have been exported to {0}', $filename));
 
@@ -157,10 +158,11 @@ public function resultsExported(Event $event, $filename)
      * `LinkScanner.resultsImported` event
      * @param \Cake\Event\Event $event An `Event` instance
      * @param string $filename Filename
-     * @return void
+     * @return bool
      */
-    public function resultsImported(Event $event, $filename)
+    public function resultsImported(Event $event, string $filename): bool
     {
+        return true;
     }
 
     /**
@@ -173,7 +175,7 @@ public function resultsImported(Event $event, $filename)
      * @uses $args
      * @uses $io
      */
-    public function scanCompleted(Event $event, $startTime, $endTime, ResultScan $ResultScan)
+    public function scanCompleted(Event $event, int $startTime, int $endTime, ResultScan $ResultScan): bool
     {
         if ($this->args->getOption('verbose')) {
             $this->io->hr();
@@ -202,7 +204,7 @@ public function scanCompleted(Event $event, $startTime, $endTime, ResultScan $Re
      * @uses $args
      * @uses $io
      */
-    public function scanStarted(Event $event, $startTime, $fullBaseUrl)
+    public function scanStarted(Event $event, int $startTime, string $fullBaseUrl): bool
     {
         if ($this->args->getOption('verbose')) {
             $this->io->hr();
@@ -218,7 +220,7 @@ public function scanStarted(Event $event, $startTime, $fullBaseUrl)
         $this->io->hr();
 
         $cache = Cache::getConfig('LinkScanner');
-        list($method, $message) = ['info', __d('link-scanner', 'The cache is disabled')];
+        [$method, $message] = ['info', __d('link-scanner', 'The cache is disabled')];
         if (!$this->args->getOption('no-cache') && Cache::enabled() && !empty($cache['duration'])) {
             $method = 'success';
             $message = __d('link-scanner', 'The cache is enabled and its duration is `{0}`', $cache['duration']);
diff --git a/src/Event/LinkScannerEventListenerInterface.php b/src/Event/LinkScannerEventListenerInterface.php
index 826af24..7bcc031 100644
--- a/src/Event/LinkScannerEventListenerInterface.php
+++ b/src/Event/LinkScannerEventListenerInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -28,7 +29,7 @@ interface LinkScannerEventListenerInterface extends EventListenerInterface
      * @param \Cake\Http\Client\Response $response A `Response` instance
      * @return bool
      */
-    public function afterScanUrl(Event $event, Response $response);
+    public function afterScanUrl(Event $event, Response $response): bool;
 
     /**
      * `LinkScanner.beforeScanUrl` event
@@ -36,7 +37,7 @@ public function afterScanUrl(Event $event, Response $response);
      * @param string $url Url
      * @return bool
      */
-    public function beforeScanUrl(Event $event, $url);
+    public function beforeScanUrl(Event $event, string $url): bool;
 
     /**
      * `LinkScanner.foundLinkToBeScanned` event
@@ -44,7 +45,7 @@ public function beforeScanUrl(Event $event, $url);
      * @param string $link Link
      * @return bool
      */
-    public function foundLinkToBeScanned(Event $event, $link);
+    public function foundLinkToBeScanned(Event $event, string $link): bool;
 
     /**
      * `LinkScanner.foundRedirect` event
@@ -52,7 +53,7 @@ public function foundLinkToBeScanned(Event $event, $link);
      * @param string $redirect Redirect
      * @return bool
      */
-    public function foundRedirect(Event $event, $redirect);
+    public function foundRedirect(Event $event, string $redirect): bool;
 
     /**
      * `LinkScanner.resultsExported` event
@@ -60,7 +61,7 @@ public function foundRedirect(Event $event, $redirect);
      * @param string $filename Filename
      * @return bool
      */
-    public function resultsExported(Event $event, $filename);
+    public function resultsExported(Event $event, string $filename): bool;
 
     /**
      * `LinkScanner.resultsImported` event
@@ -68,7 +69,7 @@ public function resultsExported(Event $event, $filename);
      * @param string $filename Filename
      * @return bool
      */
-    public function resultsImported(Event $event, $filename);
+    public function resultsImported(Event $event, string $filename): bool;
 
     /**
      * `LinkScanner.scanCompleted` event
@@ -78,7 +79,7 @@ public function resultsImported(Event $event, $filename);
      * @param \LinkScanner\ResultScan $ResultScan A `ResultScan` instance
      * @return bool
      */
-    public function scanCompleted(Event $event, $startTime, $endTime, ResultScan $ResultScan);
+    public function scanCompleted(Event $event, int $startTime, int $endTime, ResultScan $ResultScan): bool;
 
     /**
      * `LinkScanner.scanStarted` event
@@ -87,5 +88,5 @@ public function scanCompleted(Event $event, $startTime, $endTime, ResultScan $Re
      * @param string $fullBaseUrl Full base url
      * @return bool
      */
-    public function scanStarted(Event $event, $startTime, $fullBaseUrl);
+    public function scanStarted(Event $event, int $startTime, string $fullBaseUrl): bool;
 }
diff --git a/src/Plugin.php b/src/Plugin.php
index cb9d24a..84a7fbd 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
diff --git a/src/ResultScan.php b/src/ResultScan.php
index a575c46..7bb63e4 100644
--- a/src/ResultScan.php
+++ b/src/ResultScan.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -13,6 +14,7 @@
 namespace LinkScanner;
 
 use Cake\Collection\Collection;
+use Cake\Collection\CollectionInterface;
 use LinkScanner\ScanEntity;
 use Traversable;
 
@@ -25,10 +27,10 @@ class ResultScan extends Collection
      * Internal method to parse items.
      *
      * Ensures that each item is a `ScanEntity` and has all the properties it needs
-     * @param array|\Traversable $items Array of items
+     * @param iterable $items Items
      * @return array Parsed items
      */
-    protected function parseItems($items)
+    protected function parseItems(iterable $items): array
     {
         $items = $items instanceof Traversable ? $items->toArray() : $items;
 
@@ -39,10 +41,10 @@ protected function parseItems($items)
 
     /**
      * Constructor
-     * @param array|\Traversable $items Items
+     * @param iterable $items Items
      * @uses parseItems()
      */
-    public function __construct($items = [])
+    public function __construct(iterable $items = [])
     {
         parent::__construct($this->parseItems($items));
     }
@@ -52,11 +54,11 @@ public function __construct($items = [])
      *
      * Returns a new `ResultScan` instance as the result of concatenating the
      *  list of elements in this collection with the passed list of elements
-     * @param array|\Traversable $items Items
+     * @param iterable $items Items
      * @return \Cake\Collection\CollectionInterface
      * @uses parseItems()
      */
-    public function append($items)
+    public function append($items): CollectionInterface
     {
         return new ResultScan(array_merge($this->buffered()->toArray(), $this->parseItems($items)));
     }
@@ -66,11 +68,11 @@ public function append($items)
      *
      * Returns a new `ResultScan` instance as the result of concatenating the
      *  passed list of elements with the list of elements in this collection
-     * @param array|\Traversable $items Items
+     * @param iterable $items Items
      * @return \Cake\Collection\CollectionInterface
      * @uses parseItems()
      */
-    public function prepend($items)
+    public function prepend($items): CollectionInterface
     {
         return new ResultScan(array_merge($this->parseItems($items), $this->buffered()->toArray()));
     }
diff --git a/src/ScanEntity.php b/src/ScanEntity.php
index 2115777..949c040 100644
--- a/src/ScanEntity.php
+++ b/src/ScanEntity.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -46,7 +47,7 @@ public function __construct(array $properties = [])
      * @return mixed
      * @see \Cake\Http\Client\Response
      */
-    public function __call($name, $arguments)
+    public function __call(string $name, $arguments)
     {
         if (method_exists(Response::class, $name)) {
             $response = (new Response())
diff --git a/src/TestSuite/IntegrationTestTrait.php b/src/TestSuite/IntegrationTestTrait.php
index 8964e99..8ae8d0a 100644
--- a/src/TestSuite/IntegrationTestTrait.php
+++ b/src/TestSuite/IntegrationTestTrait.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -32,7 +33,7 @@ trait IntegrationTestTrait
      *  the test app
      * @return \Cake\Http\Client|\PHPUnit_Framework_MockObject_MockObject
      */
-    protected function getClientReturnsFromTests()
+    protected function getClientReturnsFromTests(): object
     {
         $Client = $this->getMockBuilder(Client::class)
             ->setMethods(['get'])
@@ -42,7 +43,7 @@ protected function getClientReturnsFromTests()
         //It also analyzes the url of the test application and transforms them into parameter arrays
         $Client->method('get')->will($this->returnCallback(function ($url) {
             if (is_string($url) && preg_match('/^http:\/\/localhost\/?(pages\/(.+))?$/', $url, $matches)) {
-                $url = ['controller' => 'Pages', 'action' => 'display', empty($matches[2]) ? 'home' : $matches[2]];
+                $url = ['controller' => 'Pages', 'action' => 'display', $matches[2] ?? 'home'];
             }
 
             call_user_func([$this, 'get'], $url);
@@ -73,7 +74,7 @@ protected function getClientReturnsFromTests()
      * @return \LinkScanner\Utility\LinkScanner|\PHPUnit_Framework_MockObject_MockObject
      * @uses getClientReturnsFromTests()
      */
-    protected function getLinkScannerClientReturnsFromTests($fullBaseUrl = null)
+    protected function getLinkScannerClientReturnsFromTests($fullBaseUrl = null): object
     {
         $fullBaseUrl = $fullBaseUrl ?: Configure::read('App.fullBaseUrl', 'http://localhost');
         $fullBaseUrl = is_string($fullBaseUrl) ? $fullBaseUrl : Router::url($fullBaseUrl, true);
diff --git a/src/TestSuite/TestCase.php b/src/TestSuite/TestCase.php
index 69d0b56..6e1deda 100644
--- a/src/TestSuite/TestCase.php
+++ b/src/TestSuite/TestCase.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -14,6 +15,7 @@
 
 use Cake\Cache\Cache;
 use Cake\Event\EventList;
+use Cake\Event\EventManager;
 use Cake\Http\Client;
 use Cake\Http\Client\Response;
 use LinkScanner\Utility\LinkScanner;
@@ -29,7 +31,7 @@ abstract class TestCase extends BaseTestCase
      * Called after every test method
      * @return void
      */
-    public function tearDown()
+    public function tearDown(): void
     {
         parent::tearDown();
 
@@ -46,7 +48,7 @@ public function tearDown()
      *  defaults to global event manager
      * @return void
      */
-    public function assertEventNotFired($name, $eventManager = null)
+    public function assertEventNotFired(string $name, ?EventManager $eventManager = null): void
     {
         $eventManager = $eventManager ?: EventManager::instance();
         $eventHasFired = $eventManager->getEventList()->hasEvent($name);
@@ -57,10 +59,10 @@ public function assertEventNotFired($name, $eventManager = null)
     /**
      * Returns a stub of `Client`, where the `get()` method always returns a
      *  response with error (404 status code)
-     * @return \Cake\Http\Client
+     * @return \Cake\Http\Client|\PHPUnit_Framework_MockObject_MockObject
      * @uses getResponseWithBody()
      */
-    protected function getClientReturnsErrorResponse()
+    protected function getClientReturnsErrorResponse(): object
     {
         $Client = $this->getMockBuilder(Client::class)
             ->setMethods(['get'])
@@ -68,7 +70,7 @@ protected function getClientReturnsErrorResponse()
 
         //This allows the `Client` instance to use the `IntegrationTestCase::get()` method
         //It also analyzes the url of the test application and transforms them into parameter arrays
-        $Client->method('get')->will($this->returnValue($this->getResponseWithBody(null)->withStatus(404)));
+        $Client->method('get')->will($this->returnValue($this->getResponseWithBody('')->withStatus(404)));
 
         return $Client;
     }
@@ -76,10 +78,10 @@ protected function getClientReturnsErrorResponse()
     /**
      * Returns a stub of `Client`, where the `get()` method returns a sample
      *  response which is read from `examples/responses` files
-     * @return \Cake\Http\Client
+     * @return \Cake\Http\Client|\PHPUnit_Framework_MockObject_MockObject
      * @uses getResponseWithBody()
      */
-    protected function getClientReturnsSampleResponse()
+    protected function getClientReturnsSampleResponse(): object
     {
         $Client = $this->getMockBuilder(Client::class)
             ->setMethods(['get'])
@@ -113,7 +115,7 @@ protected function getClientReturnsSampleResponse()
      * @param \LinkScanner\Utility\LinkScanner|null $LinkScanner `LinkScanner` instance or `null`
      * @return \Cake\Event\EventManager
      */
-    protected function getEventManager(LinkScanner $LinkScanner = null)
+    protected function getEventManager(?LinkScanner $LinkScanner = null): EventManager
     {
         $LinkScanner = $LinkScanner ?: $this->LinkScanner;
         $eventManager = $LinkScanner->getEventManager();
@@ -134,7 +136,7 @@ protected function getEventManager(LinkScanner $LinkScanner = null)
      *  `null` to create a new instance
      * @return \Cake\Http\Client\Response
      */
-    protected function getResponseWithBody($body, Response $response = null)
+    protected function getResponseWithBody(string $body, ?Response $response = null): Response
     {
         $response = $response ?: new Response();
         $stream = new Stream('php://memory', 'wb+');
diff --git a/src/Utility/LinkScanner.php b/src/Utility/LinkScanner.php
index f90ddae..d8fd0bf 100644
--- a/src/Utility/LinkScanner.php
+++ b/src/Utility/LinkScanner.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -108,7 +109,7 @@ class LinkScanner implements Serializable
      * @uses $Client
      * @uses $ResultScan
      */
-    public function __construct($Client = null, $ResultScan = null)
+    public function __construct($Client = null, ?ResultScan $ResultScan = null)
     {
         $this->Client = $Client ?: new Client(['redirect' => true]);
         $this->ResultScan = $ResultScan ?: new ResultScan();
@@ -126,7 +127,7 @@ public function __construct($Client = null, $ResultScan = null)
      * @param string $name Property name
      * @return mixed
      */
-    public function __get($name)
+    public function __get(string $name)
     {
         return $this->$name;
     }
@@ -137,7 +138,7 @@ public function __get($name)
      * @throws \RuntimeException
      * @uses $lockFile
      */
-    protected function _createLockFile()
+    protected function _createLockFile(): bool
     {
         is_true_or_fail(!$this->getConfig('lockFile') || !file_exists($this->lockFile), __d(
             'link-scanner',
@@ -154,7 +155,7 @@ protected function _createLockFile()
      * @return string
      * @since 1.0.7
      */
-    protected function _getAbsolutePath($filename)
+    protected function _getAbsolutePath(string $filename): string
     {
         $isAbsolute = (new Filesystem())->isAbsolutePath($filename);
 
@@ -171,7 +172,7 @@ protected function _getAbsolutePath($filename)
      * @uses $alreadyScanned
      * @uses $fullBaseUrl
      */
-    protected function _getResponse($url)
+    protected function _getResponse(string $url): Response
     {
         $this->alreadyScanned[] = $url;
         $cacheKey = sprintf('response_%s', md5(serialize($url)));
@@ -179,7 +180,7 @@ protected function _getResponse($url)
         $response = $this->getConfig('cache') ? Cache::read($cacheKey, 'LinkScanner') : null;
 
         if ($response && is_array($response)) {
-            list($response, $body) = $response;
+            [$response, $body] = $response;
 
             $stream = new Stream('php://memory', 'wb+');
             $stream->write($body);
@@ -223,7 +224,7 @@ protected function _getResponse($url)
      * @uses $currentDepth
      * @uses $hostname
      */
-    protected function _recursiveScan($url, $referer = null)
+    protected function _recursiveScan(string $url, ?string $referer = null): void
     {
         $response = $this->_singleScan($url, $referer);
 
@@ -268,13 +269,13 @@ protected function _recursiveScan($url, $referer = null)
      *  - `LinkScanner.foundRedirect`: will be triggered if a redirect is found.
      * @param string $url Url to scan
      * @param string|null $referer Referer of this url
-     * @return \LinkScanner\Http\Client\ScanResponse|null
+     * @return \Cake\Http\Client\Response|null
      * @uses _getResponse()
      * @uses canBeScanned()
      * @uses $ResultScan
      * @uses $hostname
      */
-    protected function _singleScan($url, $referer = null)
+    protected function _singleScan(string $url, ?string $referer = null): ?Response
     {
         $url = clean_url($url, true, true);
         if (!$this->canBeScanned($url)) {
@@ -319,7 +320,7 @@ protected function _singleScan($url, $referer = null)
      * @uses $alreadyScanned
      * @uses $hostname
      */
-    protected function canBeScanned($url)
+    protected function canBeScanned(string $url): bool
     {
         if (!is_url($url) || in_array($url, $this->alreadyScanned) ||
             (!$this->getConfig('externalLinks') && is_external_url($url, $this->hostname))) {
@@ -340,7 +341,7 @@ protected function canBeScanned($url)
      * @return string
      * @uses $Client
      */
-    public function serialize()
+    public function serialize(): string
     {
         //Unsets the event class and event manager. For the `Client` instance,
         //  it takes only configuration and cookies
@@ -357,7 +358,7 @@ public function serialize()
      * @return void
      * @uses $Client
      */
-    public function unserialize($serialized)
+    public function unserialize($serialized): void
     {
         //Resets the event list and the Client instance
         $properties = unserialize($serialized);
@@ -388,7 +389,7 @@ public function unserialize($serialized)
      * @uses $hostname
      * @uses $startTime
      */
-    public function export($filename = null)
+    public function export(?string $filename = null): string
     {
         is_true_or_fail(
             !$this->ResultScan->isEmpty(),
@@ -412,11 +413,11 @@ public function export($filename = null)
      *  - `LinkScanner.resultsImported`: will be triggered when the results have
      *  been exported.
      * @param string $filename Filename from which to import
-     * @return \LinkScanner\Utility\LinkScanner
+     * @return $this
      * @uses _getAbsolutePath()
      * @throws \RuntimeException
      */
-    public function import($filename)
+    public function import(string $filename)
     {
         $filename = $this->_getAbsolutePath($filename);
 
@@ -472,7 +473,7 @@ public function scan()
         $this->_createLockFile();
         $this->startTime = time();
 
-        $maxNestingLevel = ini_set('xdebug.max_nesting_level', -1);
+        $maxNestingLevel = ini_set('xdebug.max_nesting_level', '-1');
 
         try {
             $this->dispatchEvent('LinkScanner.scanStarted', [$this->startTime, $fullBaseUrl]);
@@ -480,7 +481,7 @@ public function scan()
             $this->endTime = time();
             $this->dispatchEvent('LinkScanner.scanCompleted', [$this->startTime, $this->endTime, $this->ResultScan]);
         } finally {
-            ini_set('xdebug.max_nesting_level', $maxNestingLevel);
+            ini_set('xdebug.max_nesting_level', (string)$maxNestingLevel);
             @unlink($this->lockFile);
         }
 
diff --git a/tests/TestCase/Command/LinkScannerCommandTest.php b/tests/TestCase/Command/LinkScannerCommandTest.php
index cfdf0cf..c8a31dd 100644
--- a/tests/TestCase/Command/LinkScannerCommandTest.php
+++ b/tests/TestCase/Command/LinkScannerCommandTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -28,8 +29,9 @@
  */
 class LinkScannerCommandTest extends TestCase
 {
-    use ConsoleIntegrationTestTrait;
-    use IntegrationTestTrait;
+    use ConsoleIntegrationTestTrait, IntegrationTestTrait {
+        ConsoleIntegrationTestTrait::configApplication insteadof IntegrationTestTrait;
+    }
 
     /**
      * @var \LinkScanner\Utility\LinkScanner
@@ -45,7 +47,7 @@ class LinkScannerCommandTest extends TestCase
      * Called before every test method
      * @return void
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -256,7 +258,7 @@ public function testScanVerbose()
         $this->assertOutputRegExp('/Timeout in seconds for GET requests: \d+/');
 
         //Moves to final lines
-        $messages = $this->_out->messages();
+        $messages = array_values(array_filter($this->_out->messages()));
         $count = count($messages);
         while (key($messages) !== $count - 5) {
             next($messages);
diff --git a/tests/TestCase/ResultScanTest.php b/tests/TestCase/ResultScanTest.php
index 3ac0ec0..1016b56 100644
--- a/tests/TestCase/ResultScanTest.php
+++ b/tests/TestCase/ResultScanTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -30,7 +31,7 @@ class ResultScanTest extends TestCase
      * Called before every test method
      * @return void
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
diff --git a/tests/TestCase/ScanEntityTest.php b/tests/TestCase/ScanEntityTest.php
index c402597..37b5ea1 100644
--- a/tests/TestCase/ScanEntityTest.php
+++ b/tests/TestCase/ScanEntityTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -32,7 +33,7 @@ class ScanEntityTest extends TestCase
      *  App if they have not already been backed up
      * @return void
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -59,7 +60,7 @@ public function testCall()
 
         foreach ($statusCodes as $code => $expectedValue) {
             $this->ScanEntity->set('code', $code);
-            $this->assertEquals($expectedValue, $this->ScanEntity->isOk());
+            $this->assertEquals($expectedValue, $this->ScanEntity->isSuccess());
         }
         $statusCodes = [
             200 => false,
diff --git a/tests/TestCase/Utility/LinkScannerTest.php b/tests/TestCase/Utility/LinkScannerTest.php
index 628d18d..e42e514 100644
--- a/tests/TestCase/Utility/LinkScannerTest.php
+++ b/tests/TestCase/Utility/LinkScannerTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -55,7 +56,7 @@ class LinkScannerTest extends TestCase
      * Called before every test method
      * @return void
      */
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
@@ -102,7 +103,7 @@ public function testGetResponse()
             $response = Cache::read(sprintf('response_%s', md5(serialize($url))), 'LinkScanner');
 
             if ($response && is_array($response)) {
-                list($response, $body) = $response;
+                [$response, $body] = $response;
 
                 $stream = new Stream('php://memory', 'wb+');
                 $stream->write($body);
@@ -130,17 +131,15 @@ public function testGetResponse()
         $this->LinkScanner->setConfig('cache', true);
 
         foreach ([
-            'nolinks' => 200,
-            'home' => 200,
-            'noexisting' => 500,
-        ] as $pageName => $expectedStatusCode) {
-            $params = ['controller' => 'Pages', 'action' => 'display', $pageName];
-
-            $response = $getResponseMethod($params);
+            'http://localhost/pages/nolinks' => 200,
+            'http://localhost/pages/home' => 200,
+            'http://localhost/pages/noexisting' => 500,
+        ] as $url => $expectedStatusCode) {
+            $response = $getResponseMethod($url);
             $this->assertEquals($expectedStatusCode, $response->getStatusCode());
             $this->assertStringStartsWith('text/html', $response->getHeaderLine('content-type'));
 
-            $responseFromCache = $getResponseFromCache($params);
+            $responseFromCache = $getResponseFromCache($url);
             if ($response->isOk()) {
                 $this->assertNotEmpty($responseFromCache);
                 $this->assertInstanceof(Response::class, $responseFromCache);
@@ -360,8 +359,7 @@ public function testScanFromTests()
             'Found link: http://localhost/pages/sameredirect',
             'Scanning http://localhost/pages/sameredirect',
         ];
-        $params = ['controller' => 'Pages', 'action' => 'display', 'home'];
-        $LinkScanner = $this->getLinkScannerClientReturnsFromTests($params);
+        $LinkScanner = $this->getLinkScannerClientReturnsFromTests();
         $LinkScanner->scan();
         $this->assertEquals($expectedDebug, $this->debug);
 
@@ -408,7 +406,7 @@ public function testScanFromTests()
             'Found link: http://localhost/pages/sameredirect',
             'Scanning http://localhost/pages/sameredirect',
         ];
-        $LinkScanner = $this->getLinkScannerClientReturnsFromTests($params);
+        $LinkScanner = $this->getLinkScannerClientReturnsFromTests();
         $LinkScanner->setConfig('followRedirects', true)->scan();
         $this->assertEquals($expectedDebug, $this->debug);
 
@@ -420,7 +418,7 @@ public function testScanFromTests()
         $this->assertEquals($expectedInternal, $internalLinks->toList());
         $this->assertEquals($expectedExternal, $externalLinks->toList());
 
-        $LinkScanner = $this->getLinkScannerClientReturnsFromTests($params);
+        $LinkScanner = $this->getLinkScannerClientReturnsFromTests();
         $LinkScanner->setConfig('maxDepth', 1)->scan();
         $this->assertCount(1, $LinkScanner->ResultScan);
         $item = $LinkScanner->ResultScan->first();
@@ -437,7 +435,7 @@ public function testScanFromTests()
      */
     public function testScanNoOtherLinks()
     {
-        $LinkScanner = $this->getLinkScannerClientReturnsFromTests(['controller' => 'Pages', 'action' => 'display', 'nolinks']);
+        $LinkScanner = $this->getLinkScannerClientReturnsFromTests('http://localhost/pages/nolinks');
 
         $this->assertEventNotFired('LinkScanner.foundLinkToBeScanned', $this->getEventManager($LinkScanner->scan()));
     }
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index d2e42e4..22b9a22 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -90,6 +91,4 @@
 
 Configure::write('pluginsToLoad', ['LinkScanner']);
 
-loadPHPUnitAliases();
-
 $_SERVER['PHP_SELF'] = '/';
diff --git a/tests/test_app/TestApp/Application.php b/tests/test_app/TestApp/Application.php
index 833c96d..3095848 100644
--- a/tests/test_app/TestApp/Application.php
+++ b/tests/test_app/TestApp/Application.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * This file is part of cakephp-link-scanner.
  *
@@ -13,6 +14,7 @@
 namespace App;
 
 use Cake\Http\BaseApplication;
+use Cake\Http\MiddlewareQueue;
 use Cake\Routing\Middleware\RoutingMiddleware;
 use LinkScanner\Plugin as LinkScanner;
 
@@ -27,7 +29,7 @@ class Application extends BaseApplication
     /**
      * Load all the application configuration and bootstrap logic
      */
-    public function bootstrap()
+    public function bootstrap(): void
     {
         $this->addPlugin(LinkScanner::class);
     }
@@ -37,10 +39,8 @@ public function bootstrap()
      * @param \Cake\Http\MiddlewareQueue $middlewareQueue The middleware queue to set in your App Class
      * @return \Cake\Http\MiddlewareQueue
      */
-    public function middleware($middlewareQueue)
+    public function middleware($middlewareQueue): MiddlewareQueue
     {
-        $middlewareQueue->add(new RoutingMiddleware($this));
-
-        return $middlewareQueue;
+        return $middlewareQueue->add(new RoutingMiddleware($this));
     }
 }
diff --git a/tests/test_app/TestApp/Controller/AppController.php b/tests/test_app/TestApp/Controller/AppController.php
index 2f38a4d..34dc990 100644
--- a/tests/test_app/TestApp/Controller/AppController.php
+++ b/tests/test_app/TestApp/Controller/AppController.php
@@ -1,11 +1,13 @@
 <?php
+declare(strict_types=1);
+
 namespace App\Controller;
 
 use Cake\Controller\Controller;
 
 class AppController extends Controller
 {
-    public function initialize()
+    public function initialize(): void
     {
         parent::initialize();
 
diff --git a/tests/test_app/TestApp/Controller/PagesController.php b/tests/test_app/TestApp/Controller/PagesController.php
index ee1636c..59fb5c8 100644
--- a/tests/test_app/TestApp/Controller/PagesController.php
+++ b/tests/test_app/TestApp/Controller/PagesController.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 namespace App\Controller;
 
 use Cake\Core\Configure;
@@ -21,7 +23,7 @@ public function display(...$path)
     {
         //Disables the layout for `nohtml` and `nolinks` pages
         if (in_array(array_value_first($path), ['nohtml', 'nolinks'])) {
-            $this->viewBuilder()->setLayout(false);
+            $this->viewBuilder()->disableAutoLayout();
         }
 
         $count = count($path);
diff --git a/tests/test_app/TestApp/Template/Error/error500.php b/tests/test_app/TestApp/Template/Error/error500.php
new file mode 100644
index 0000000..826e686
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Error/error500.php
@@ -0,0 +1,45 @@
+<?php
+declare(strict_types=1);
+
+use Cake\Core\Configure;
+use Cake\Error\Debugger;
+
+$this->layout = 'error';
+
+if (Configure::read('debug')) :
+    $this->layout = 'dev_error';
+
+    $this->assign('title', $message);
+    $this->assign('templateName', 'error500.php');
+
+    $this->start('file');
+    ?>
+    <?php if (!empty($error->queryString)) : ?>
+        <p class="notice">
+            <strong>SQL Query: </strong>
+            <?= h($error->queryString) ?>
+        </p>
+    <?php endif; ?>
+    <?php if (!empty($error->params)) : ?>
+            <strong>SQL Query Params: </strong>
+            <?php Debugger::dump($error->params) ?>
+    <?php endif; ?>
+    <?php if ($error instanceof Error) : ?>
+            <strong>Error in: </strong>
+            <?= sprintf('%s, line %s', str_replace(ROOT, 'ROOT', $error->getFile()), $error->getLine()) ?>
+    <?php endif; ?>
+    <?php
+    echo $this->element('auto_table_warning');
+
+    if (extension_loaded('xdebug')) :
+        xdebug_print_function_stack();
+    endif;
+
+    $this->end();
+endif;
+?>
+<h2><?= __d('cake', 'An Internal Error Has Occurred') ?></h2>
+<p class="error">
+    <strong><?= __d('cake', 'Error') ?>: </strong>
+    <?= h($message) ?>
+</p>
\ No newline at end of file
diff --git a/tests/test_app/TestApp/Template/Pages/first_page.ctp b/tests/test_app/TestApp/Template/Pages/first_page.ctp
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/test_app/TestApp/Template/Pages/first_page.php b/tests/test_app/TestApp/Template/Pages/first_page.php
new file mode 100644
index 0000000..a766f11
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Pages/first_page.php
@@ -0,0 +1,2 @@
+<?php
+declare(strict_types=1);
diff --git a/tests/test_app/TestApp/Template/Pages/home.ctp b/tests/test_app/TestApp/Template/Pages/home.php
similarity index 100%
rename from tests/test_app/TestApp/Template/Pages/home.ctp
rename to tests/test_app/TestApp/Template/Pages/home.php
diff --git a/tests/test_app/TestApp/Template/Pages/nohtml.ctp b/tests/test_app/TestApp/Template/Pages/nohtml.ctp
deleted file mode 100644
index 3c1bc55..0000000
--- a/tests/test_app/TestApp/Template/Pages/nohtml.ctp
+++ /dev/null
@@ -1 +0,0 @@
-No HTML here!
diff --git a/tests/test_app/TestApp/Template/Pages/nohtml.php b/tests/test_app/TestApp/Template/Pages/nohtml.php
new file mode 100644
index 0000000..4445fdd
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Pages/nohtml.php
@@ -0,0 +1,4 @@
+<?php
+declare(strict_types=1);
+
+print 'No HTML here!';
diff --git a/tests/test_app/TestApp/Template/Pages/nolinks.ctp b/tests/test_app/TestApp/Template/Pages/nolinks.ctp
deleted file mode 100644
index 69c62ee..0000000
--- a/tests/test_app/TestApp/Template/Pages/nolinks.ctp
+++ /dev/null
@@ -1 +0,0 @@
-<b>No links here</b>
\ No newline at end of file
diff --git a/tests/test_app/TestApp/Template/Pages/nolinks.php b/tests/test_app/TestApp/Template/Pages/nolinks.php
new file mode 100644
index 0000000..068bea1
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Pages/nolinks.php
@@ -0,0 +1,4 @@
+<?php
+declare(strict_types=1);
+
+print '<b>No links here</b>';
diff --git a/tests/test_app/TestApp/Template/Pages/second_page.ctp b/tests/test_app/TestApp/Template/Pages/second_page.ctp
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/test_app/TestApp/Template/Pages/second_page.php b/tests/test_app/TestApp/Template/Pages/second_page.php
new file mode 100644
index 0000000..a766f11
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Pages/second_page.php
@@ -0,0 +1,2 @@
+<?php
+declare(strict_types=1);
diff --git a/tests/test_app/TestApp/Template/Pages/third_page.ctp b/tests/test_app/TestApp/Template/Pages/third_page.ctp
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/test_app/TestApp/Template/Pages/third_page.php b/tests/test_app/TestApp/Template/Pages/third_page.php
new file mode 100644
index 0000000..a766f11
--- /dev/null
+++ b/tests/test_app/TestApp/Template/Pages/third_page.php
@@ -0,0 +1,2 @@
+<?php
+declare(strict_types=1);
diff --git a/tests/test_app/TestApp/Template/Layout/default.ctp b/tests/test_app/TestApp/Template/layout/default.php
similarity index 100%
rename from tests/test_app/TestApp/Template/Layout/default.ctp
rename to tests/test_app/TestApp/Template/layout/default.php
diff --git a/tests/test_app/TestApp/Template/Layout/with_flash.ctp b/tests/test_app/TestApp/Template/layout/with_flash.php
similarity index 100%
rename from tests/test_app/TestApp/Template/Layout/with_flash.ctp
rename to tests/test_app/TestApp/Template/layout/with_flash.php
diff --git a/tests/test_app/TestApp/config/routes.php b/tests/test_app/TestApp/config/routes.php
index b4770f3..f7a027f 100644
--- a/tests/test_app/TestApp/config/routes.php
+++ b/tests/test_app/TestApp/config/routes.php
@@ -1,8 +1,8 @@
 <?php
 
+use Cake\Routing\Route\DashedRoute;
 use Cake\Routing\RouteBuilder;
 use Cake\Routing\Router;
-use Cake\Routing\Route\DashedRoute;
 
 Router::defaultRouteClass(DashedRoute::class);
 
diff --git a/version b/version
index b0f3d96..9084fa2 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-1.0.8
+1.1.0