diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 2383b8cd..bf1155c6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['7.2', '7.3', '7.4']
+        php: ['7.3', '7.4']
     container:
       image: php:${{ matrix.php }}-cli-alpine
     steps:
@@ -53,9 +53,7 @@ jobs:
 
     - name: Test & Generate Code Coverage
       run: |
-        wget -q -O phpunit https://phar.phpunit.de/phpunit-8.phar
-        chmod +x phpunit
-        ./phpunit -d memory_limit=512M --coverage-clover tests/logs/clover.xml
+        ./vendor/bin/phpunit -d memory_limit=512M --coverage-clover tests/logs/clover.xml
 
     - name: Send to coveralls
       run: |
diff --git a/README.md b/README.md
index a4e84900..8a62fd51 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ All you have to do:
 
 ## Requirements
 
-* PHP 7.2 / 7.3 / 7.4
+* PHP 7.3 / 7.4
 * Symfony 5.0
 * See also the `require` section of [composer.json](composer.json)
 
@@ -69,7 +69,7 @@ the way to tell this bundle to interact with your application.
 You can run the tests with:
 ```console
 $ php tests/app/bin/console cache:clear # Only if you added new code
-$ phpunit
+$ vendor/bin/phpunit
 ```
 
 ## Validate code with coding standards
diff --git a/composer.json b/composer.json
index c4e1c04b..5a6178c2 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^7.2.5",
+        "php": "^7.3",
         "ext-json": "*",
         "symfony/framework-bundle": "~5.0.1",
         "symfony/console": "~5.0.1",
@@ -35,6 +35,7 @@
         "jmgq/a-star": "^1.1"
     },
     "require-dev": {
+        "phpunit/phpunit": "~9.0.1",
         "symfony/yaml": "~5.0.1",
         "symfony/expression-language": "~5.0.1",
         "symfony/security-core": "~5.0.1",
diff --git a/tests/Message/TaskMessageTest.php b/tests/Message/TaskMessageTest.php
index e57d066c..ad61bc5c 100644
--- a/tests/Message/TaskMessageTest.php
+++ b/tests/Message/TaskMessageTest.php
@@ -58,7 +58,7 @@ public function testExecute(string $model, string $generator, string $reducer, b
                 $ids = [];
                 foreach ($bugs[0]->getSteps() as $step) {
                     if ($step->getData() && $step->getData()->has('product')) {
-                        $ids[] = $step->getData()->get('product');
+                        $ids[] = (int) $step->getData()->get('product');
                     }
                 }
                 if ('You added an out-of-stock product into cart! Can not checkout' === $bugs[0]->getBugMessage()) {