diff --git a/.github/workflows/assign-copilot-reviewer.yml b/.github/workflows/assign-copilot-reviewer.yml
index 4fb2d49e1..05d8000ed 100644
--- a/.github/workflows/assign-copilot-reviewer.yml
+++ b/.github/workflows/assign-copilot-reviewer.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Assign Copilot as reviewer
-        uses: actions/github-script@v7
+        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
         with:
           github-token: ${{ secrets.COPILOT_ASSIGNING_PAT }}
           script: |