diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2e8664a..54accc9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
         platform: [ubuntu-latest]
     runs-on: ${{ matrix.platform }}
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.3
     - name: Install Go
       uses: actions/setup-go@v6
       with: