diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index c1a008885..8fbccdeb9 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -12,7 +12,7 @@ jobs:
   deploy:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
         with:
           fetch-depth: 10
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 42c51bb55..81e582eec 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2.2.2