diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index f2b99fb7..0cb0dca6 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -25,7 +25,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Python dependencies
         run: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b684bf38..00020c57 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
             path: "intro/mqtt/host-client"
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Update ownership
         run: |
diff --git a/.github/workflows/docker_image.yml b/.github/workflows/docker_image.yml
index fe9edcfd..ad3e9a65 100644
--- a/.github/workflows/docker_image.yml
+++ b/.github/workflows/docker_image.yml
@@ -35,7 +35,7 @@ jobs:
             path: "intro/mqtt/host-client"
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Update ownership
         run: |
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3