diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bc2fd86..301166e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
       OS: "linux"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Check copyright headers
         if: success()