diff --git a/.github/workflows/check-continentmap.yml b/.github/workflows/check-continentmap.yml
index f2b116b..dd7b1da 100644
--- a/.github/workflows/check-continentmap.yml
+++ b/.github/workflows/check-continentmap.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2.3.4
+    - uses: actions/checkout@v2.3.5
 
     - name: Check continentmap
       run: make check-continentmap
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 5b70c83..b5ca167 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v2.3.5
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2d69bc3..da17f21 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     continue-on-error: true
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.3.5
 
       - name: Install dependencies
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d32a98b..aa6455a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
           - "1.17"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.3.4
+    - uses: actions/checkout@v2.3.5
     - uses: actions/setup-go@v2
       with:
         go-version: ${{ matrix.go-version }}