diff --git a/.github/workflows/build-images.yml b/.github/workflows/build-images.yml
index 2aa9e1d..fce796f 100644
--- a/.github/workflows/build-images.yml
+++ b/.github/workflows/build-images.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Log in to Docker Hub
       if: github.ref == 'refs/heads/master'