diff --git a/.github/workflows/pull-request-check.yml b/.github/workflows/pull-request-check.yml
index 845a3666..2695a7b4 100644
--- a/.github/workflows/pull-request-check.yml
+++ b/.github/workflows/pull-request-check.yml
@@ -23,6 +23,6 @@ jobs:
       - name: Running unit test
         uses: php-actions/phpunit@v3
         with:
-          version: 9.5
+          version: 9.6
           php_version: 8.1
           configuration: phpunit.xml
diff --git a/composer.json b/composer.json
index 3e6d2866..998111cd 100755
--- a/composer.json
+++ b/composer.json
@@ -70,7 +70,7 @@
     },
     "require-dev": {
         "mockery/mockery": "~1.3",
-        "phpunit/phpunit": "~9.5",
+        "phpunit/phpunit": "~9.6",
         "phpspec/prophecy-phpunit": "~2.0",
         "symfony/var-dumper": "~6.4"
     },