diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 313a1d5..d91cc18 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -16,7 +16,7 @@ jobs:
 
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v2
+              uses: actions/checkout@v2.3.4
               with:
                   # We must fetch at least the immediate parents so that if this is
                   # a pull request then we can checkout the head.
diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index 456b409..b579aae 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -10,7 +10,7 @@ jobs:
 
         steps:
             - name: Check out the repo
-              uses: actions/checkout@v2.3.1
+              uses: actions/checkout@v2.3.4
             - name: Build and push Docker images
               uses: docker/build-push-action@v1.1.0
               with:
diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 5dfe727..d8cfa8c 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -12,7 +12,7 @@ jobs:
 
         steps:
             - name: Check out the repo
-              uses: actions/checkout@v2.3.1
+              uses: actions/checkout@v2.3.4
             - name: Use Node.js
               uses: actions/setup-node@v2.1.4
               with: