diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index b906fac2..38751b3d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
   format_code:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
 
     - name: Install clang-format
       uses: aminya/setup-cpp@v1