diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dc32fa5..28e7f1f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
         python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v3.0.2
       with:
           fetch-depth: 0
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 90d426f..808232b 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2.3.4
+    - uses: actions/checkout@v3.0.2
     - name: Set up Python 3.9
       uses: actions/setup-python@v4
       with:
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index a4092e3..84a3f6f 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v3.0.2
       with:
           fetch-depth: 0
     - name: Set up Python ${{ matrix.python-version }}