diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index 15e09fd..9fc122f 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -67,7 +67,7 @@ jobs:
         options: --name=postgres
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
 
       - name: Prepare image parameters
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5b54a46..e260ff6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -118,7 +118,7 @@ jobs:
             exit 1
           fi
       - name: Git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
diff --git a/.github/workflows/delete-cache.yml b/.github/workflows/delete-cache.yml
index c695363..655ffb3 100644
--- a/.github/workflows/delete-cache.yml
+++ b/.github/workflows/delete-cache.yml
@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: Git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Cleanup
         run: |
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ee717bb..0ae0c46 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -111,7 +111,7 @@ jobs:
           aws-region: ${{ secrets.AWS_REGION }}
 
       - name: Git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ inputs.branch }}
 
diff --git a/.github/workflows/publish-docs.yml b/.github/workflows/publish-docs.yml
index fae396b..e0a93eb 100644
--- a/.github/workflows/publish-docs.yml
+++ b/.github/workflows/publish-docs.yml
@@ -146,7 +146,7 @@ jobs:
           EOF
 
       - name: Git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ inputs.branch }}