diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d37f1f..94d3935 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
 
       - run: pip install -U tox
 
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
 
       - run: pip install -U tox
 
@@ -41,7 +41,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2