diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 36f8a63..d9e96d6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Check out this repo
-              uses: actions/checkout@v6
+              uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
             - name: Unpack tars
               run: make unpack