diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b3787467..17553431 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Build
         run: go build -v -o output/kk ./main.go
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 2f631c9f..97240ef4 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
       - name: Unshallow
         run: git fetch --prune --unshallow
       - name: Set up Go