diff --git a/.github/workflows/build-multiarch.yml b/.github/workflows/build-multiarch.yml
index d376681b..1a0e2284 100644
--- a/.github/workflows/build-multiarch.yml
+++ b/.github/workflows/build-multiarch.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.2.0
+        uses: actions/checkout@v2.3.4
 
       - name: Prepare
         id: prep
diff --git a/.github/workflows/generate-toc.yml b/.github/workflows/generate-toc.yml
index 75e81c46..4a31c0b1 100644
--- a/.github/workflows/generate-toc.yml
+++ b/.github/workflows/generate-toc.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
       - run: |
           curl https://raw.githubusercontent.com/ekalinin/github-markdown-toc/master/gh-md-toc -o gh-md-toc
           chmod a+x gh-md-toc
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 867138b5..0f97891f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Run tests
         run: |
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
 
     - name: Prepare
       id: prep
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 16096da7..8820d4f4 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.4
 
       - name: Run tests
         run: |