diff --git a/composer.json b/composer.json
--- a/composer.json
+++ b/composer.json
@@ -18,14 +18,14 @@
     "issues": "https://devcentral.nasqueron.org"
   },
   "require": {
-    "php": ">=5.6.0",
-    "guzzlehttp/psr7": "~1.3",
-    "guzzlehttp/guzzle": "~6.0"
+    "php": ">=7.3",
+    "guzzlehttp/psr7": "^2.4.1",
+    "guzzlehttp/guzzle": "^7.5.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "5.0.*",
-    "psy/psysh": "dev-master",
-    "squizlabs/php_codesniffer": "*"
+    "phpunit/phpunit": "^9.0.0",
+    "psy/psysh": "^v0.11.8",
+    "squizlabs/php_codesniffer": "^3.7.1"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpunit.xml b/phpunit.xml
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,5 +1,9 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<phpunit bootstrap="./vendor/autoload.php">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         bootstrap="./vendor/autoload.php"
+         colors="true"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+         stopOnFailure="false">
     <testsuites>
         <testsuite name="Library test suite">
             <directory>./tests/</directory>
diff --git a/tests/Build/Payloads/SourceRepositoryBuildPayloadTest.php b/tests/Build/Payloads/SourceRepositoryBuildPayloadTest.php
--- a/tests/Build/Payloads/SourceRepositoryBuildPayloadTest.php
+++ b/tests/Build/Payloads/SourceRepositoryBuildPayloadTest.php
@@ -4,7 +4,9 @@
 
 use Keruald\DockerHub\Build\Payloads\SourceRepositoryBuildPayload;
 
-class SourceRepositoryBuildPayloadTest extends \PHPUnit_Framework_TestCase {
+use PHPUnit\Framework\TestCase;
+
+class SourceRepositoryBuildPayloadTest extends TestCase {
 
     public function testIsValidType () {
         $this->assertTrue(SourceRepositoryBuildPayload::isValidType('Tag'));
@@ -14,10 +16,8 @@
         $this->assertFalse(SourceRepositoryBuildPayload::isValidType(null));
     }
 
-    /**
-     * @expectedException \InvalidArgumentException
-     */
     public function testInvalidTypeThrowException () {
+        $this->expectException(\InvalidArgumentException::class);
         $mock = new NotExistingObjectBuildPayloadMock();
     }
 
diff --git a/tests/Build/TriggerBuildFactoryTest.php b/tests/Build/TriggerBuildFactoryTest.php
--- a/tests/Build/TriggerBuildFactoryTest.php
+++ b/tests/Build/TriggerBuildFactoryTest.php
@@ -8,7 +8,9 @@
 
 use Keruald\DockerHub\Tests\WithMockHttpClient;
 
-class TriggerBuildFactoryTest extends \PHPUnit_Framework_TestCase {
+use PHPUnit\Framework\TestCase;
+
+class TriggerBuildFactoryTest extends TestCase {
 
     use WithMockHttpClient;
 
@@ -17,7 +19,7 @@
      */
     protected $factory;
 
-    public function setUp () {
+    public function setUp () : void {
         $client = self::mockHttpClient();
         $tokens = self::mockTokens();
         $this->factory = new TriggerBuildFactory($client, $tokens);
@@ -39,10 +41,8 @@
         );
     }
 
-    /**
-     * @expectedException \InvalidArgumentException
-     */
     public function testGetForImageWithoutToken () {
+        $this->expectException(\Exception::class);
         $this->factory->getForImage("acme/bar");
     }
 
@@ -51,6 +51,7 @@
         // We don't need to test the sendPayloadForAll method.
         // So, we only need to check there is no exception or error.
         $this->factory->build("acme/foo");
+        $this->expectNotToPerformAssertions();
     }
 
     public function testHasToken () {
diff --git a/tests/Build/TriggerBuildTest.php b/tests/Build/TriggerBuildTest.php
--- a/tests/Build/TriggerBuildTest.php
+++ b/tests/Build/TriggerBuildTest.php
@@ -10,7 +10,9 @@
 
 use Keruald\DockerHub\Tests\WithMockHttpClient;
 
-class TriggerBuildTest extends \PHPUnit_Framework_TestCase {
+use PHPUnit\Framework\TestCase;
+
+class TriggerBuildTest extends TestCase {
 
     use WithMockHttpClient;
 
@@ -24,7 +26,7 @@
      */
     protected $image;
 
-    public function setUp () {
+    public function setUp () : void {
         $this->image = new DockerHubImage("acme", "foo");
         $this->trigger = new TriggerBuild($this->image, "0000");
     }
@@ -70,17 +72,13 @@
     /// Overloads test
     ///
 
-    /**
-     * @expectedException \BadMethodCallException
-     */
     public function testMethodOverloadingForNonExistingMethod () {
+        $this->expectException(\BadMethodCallException::class);
         $this->trigger->loremIpsum();
     }
 
-    /**
-     * @expectedException \BadMethodCallException
-     */
     public function testMethodOverloadingForNonExistingPayloadMethod () {
+        $this->expectException(\BadMethodCallException::class);
         $this->trigger->sendPayloadForLoremIpsum();
     }
 
@@ -88,17 +86,13 @@
     /// HTTP client tests
     ///
 
-    /**
-     * @expectedException \InvalidArgumentException
-     */
      public function testPostWhenClientIsNull () {
+        $this->expectException(\InvalidArgumentException::class);
         $this->trigger->sendPayloadForAll();
      }
 
-    /**
-     * @expectedException \RuntimeException
-     */
      public function testPostThrowsRuntimeExceptionWhenResponseIsNot200 () {
+        $this->expectException(\RuntimeException::class);
         $mockClient = $this->mockHttpClient(500);
         $trigger = new TriggerBuild($this->image, "0000", $mockClient);
         $trigger->sendPayloadForAll();
diff --git a/tests/DockerHubImageTest.php b/tests/DockerHubImageTest.php
--- a/tests/DockerHubImageTest.php
+++ b/tests/DockerHubImageTest.php
@@ -5,7 +5,9 @@
 use Keruald\DockerHub\DockerHubImage;
 use Keruald\DockerHub\Build\TriggerBuild;
 
-class DockerHubImageTest extends \PHPUnit_Framework_TestCase {
+use PHPUnit\Framework\TestCase;
+
+class DockerHubImageTest extends TestCase {
 
     use WithMockHttpClient;
 
@@ -14,7 +16,7 @@
      */
     private $image;
 
-    public function setUp () {
+    public function setUp () : void {
         $this->image = new DockerHubImage("acme", "foo");
     }
 
@@ -23,10 +25,8 @@
         $this->assertEquals($slashNotationImage, $this->image);
     }
 
-    /**
-     * @expectedException \InvalidArgumentException
-     */
     public function testLoadFromSlashNotationWithInvalidArgument () {
+        $this->expectException(\Exception::class);
         DockerHubImage::loadFromSlashNotation("foo");
     }