diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
index 08ebc87a2..32fed3ffc 100644
--- a/.github/workflows/cleanup-caches.yml
+++ b/.github/workflows/cleanup-caches.yml
@@ -18,6 +18,6 @@ jobs:
       actions: write
     steps:
       - name: Cleanup
-        uses: 4m-mazi/souji-action@v1
+        uses: 4m-mazi/souji-action@7b968d0f5b22b33600ca69829fc08914f8bcccd9 # v1
         with:
           branch-names: ${{ inputs.branchNames }}