diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 881a4c8..014f527 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -22,11 +22,11 @@ jobs:
 
     steps:
       # https://github.com/dependabot/dependabot-core/issues/3253#issuecomment-799466911
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: ${{ github.event_name == 'pull_request_target' }}
         with:
           ref: ${{ github.event.pull_request.head.sha }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: ${{ github.event_name != 'pull_request_target' }}
       
       - name: Free disk space (Ubuntu only)