diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2897db0..6ada769 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,6 +42,12 @@ jobs:
         - name: Validate composer.json and composer.lock
           run: composer validate --strict
 
+        - name: Setup PHP
+          uses: shivammathur/setup-php@v2
+          with:
+            php-version: ${{ matrix.php-version }}
+            extensions: mbstring, intl, pdo_${{ matrix.db-type }}
+
         - name: Cache Composer packages
           id: composer-cache
           uses: actions/cache@v2
@@ -88,7 +94,7 @@ jobs:
         - name: Setup PHP
           uses: shivammathur/setup-php@v2
           with:
-            php-version: '7.4'
+            php-version: '8.0'
             coverage: none
             tools: cs2pr
 
diff --git a/composer.json b/composer.json
index d691fc5..6f22255 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "cakephp/cakephp-codesniffer": "^4.0",
-        "phpunit/phpunit": "^8.5|^9.0"
+        "phpunit/phpunit": "^8.5.14|^9.0"
     },
     "autoload": {
         "psr-4": {