diff --git a/.github/workflows/autoapp.yml b/.github/workflows/autoapp.yml
index 64d3375..250c592 100644
--- a/.github/workflows/autoapp.yml
+++ b/.github/workflows/autoapp.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest] # not windows because of NUPACK
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: '3.8'
diff --git a/.github/workflows/autolicense.yml b/.github/workflows/autolicense.yml
index 0715775..96e8f51 100644
--- a/.github/workflows/autolicense.yml
+++ b/.github/workflows/autolicense.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: "3.8"
diff --git a/.github/workflows/autotest.yml b/.github/workflows/autotest.yml
index fbf564f..7fe61eb 100644
--- a/.github/workflows/autotest.yml
+++ b/.github/workflows/autotest.yml
@@ -16,7 +16,7 @@ jobs:
         os: [ubuntu-latest, macos-latest] # not windows because of NUPACK
         python-version: [3.6, 3.7, 3.8, 3.9]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/autowheel.yml b/.github/workflows/autowheel.yml
index 17f1f24..348b416 100644
--- a/.github/workflows/autowheel.yml
+++ b/.github/workflows/autowheel.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
       - uses: actions/setup-node@v2
         with:
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index ffca19d..a27b4cf 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,7 +39,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/contribution.yml b/.github/workflows/contribution.yml
index d122b84..b7dcb3b 100644
--- a/.github/workflows/contribution.yml
+++ b/.github/workflows/contribution.yml
@@ -27,7 +27,7 @@ jobs:
           - "2020_CSMU_Taiwan-2.0"
           - "2020_CSMU_Taiwan-2.1"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8