diff --git a/.github/workflows/merge-schedule.yml b/.github/workflows/merge-schedule.yml
index ddb7faa..0e0f407 100644
--- a/.github/workflows/merge-schedule.yml
+++ b/.github/workflows/merge-schedule.yml
@@ -14,7 +14,7 @@ jobs:
   merge_schedule:
     runs-on: ubuntu-latest
     steps:
-      - uses: gr2m/merge-schedule-action@v2
+      - uses: gr2m/merge-schedule-action@c516ecea9b265888ed9f7ba5f82b964dd678d80f # v2.5.0
         with:
           # Merge method to use. Possible values are merge, squash or
           # rebase. Default is merge.