diff --git a/.github/workflows/add-to-project.yml b/.github/workflows/add-to-project.yml
index db1dc98..76381ee 100644
--- a/.github/workflows/add-to-project.yml
+++ b/.github/workflows/add-to-project.yml
@@ -9,7 +9,7 @@ jobs:
   add-to-project:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - uses: actions/create-github-app-token@v1
         id: app-token