diff --git a/.github/workflows/codeql.yaml b/.github/workflows/codeql.yaml
index 0524aa3..205eeae 100644
--- a/.github/workflows/codeql.yaml
+++ b/.github/workflows/codeql.yaml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
         with:
           # We must fetch at least the immediate parents so that if this is
           # a pull request then we can checkout the head.
diff --git a/.github/workflows/commitlint.yml b/.github/workflows/commitlint.yml
index 9d565af..6c0492c 100644
--- a/.github/workflows/commitlint.yml
+++ b/.github/workflows/commitlint.yml
@@ -5,7 +5,7 @@ jobs:
   commitlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           fetch-depth: 0
       - uses: wagoid/commitlint-github-action@v3.1.0