diff --git a/.gitea/workflows/php-cs-fixer.yml b/.gitea/workflows/php-cs-fixer.yml
index 584a649..a41771a 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@sha256:7acace03561de8d627faa89c63c0947c8805657bc2ee04884c651501f56c3a1f
         with:
           args: --diff --dry-run