diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 367b9ea..7216d0f 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -27,7 +27,7 @@ jobs:
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@v4
+      uses: actions/cache@v6
       with:
         path: vendor
         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}