diff --git a/.gitea/workflows/php-cs-fixer.yml b/.gitea/workflows/php-cs-fixer.yml
index 584a649..7618c54 100644
--- a/.gitea/workflows/php-cs-fixer.yml
+++ b/.gitea/workflows/php-cs-fixer.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Run PHP CS Fixer
-        uses: docker://oskarstark/php-cs-fixer-ga
+        uses: docker://oskarstark/php-cs-fixer-ga@sha256:92252198e314c0c0142652ed7935b5e9c6e037a943728ae815f060a46237391a
         with:
           args: --diff --dry-run