diff --git a/.github/workflows/licenses.yml b/.github/workflows/licenses.yml
index c1ea6e5..ae5374d 100644
--- a/.github/workflows/licenses.yml
+++ b/.github/workflows/licenses.yml
@@ -15,7 +15,7 @@ jobs:
       PYPI_USERNAME: ${{ secrets.PYPI_USERNAME }}
       PYPI_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v3.0.2
       - name: Setup Python
         uses: actions/setup-python@v2.3.1
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0cda24d..a64f167 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,7 +6,7 @@ jobs:
   publish-pypi:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3.0.2
       - name: Set up Python 3.8
         uses: actions/setup-python@v2.2.1
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b097799..45dd830 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.0.2
       - name: Set up Python
         uses: actions/setup-python@v2.2.1
         with:
@@ -22,7 +22,7 @@ jobs:
       matrix:
         python-version: [3.6, 3.7, 3.8]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.0.2
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2.2.1
       with:
@@ -35,7 +35,7 @@ jobs:
   coverage:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3.0.2
       - name: Setup Python
         uses: actions/setup-python@v2.2.1
         with: