diff --git a/.github/workflows/build-images.yml b/.github/workflows/build-images.yml
index edb9d20..d8d50d3 100644
--- a/.github/workflows/build-images.yml
+++ b/.github/workflows/build-images.yml
@@ -30,7 +30,7 @@ jobs:
           script: |
             return context.repo.owner.toLowerCase()
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set nightly tag if commit was on main
         id: add-nightly-tag
@@ -102,7 +102,7 @@ jobs:
       tags: ${{ needs.build-info.outputs.tags }}
       repo-owner: ${{ needs.build-info.outputs.repo-owner }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - run: |
           echo "inputs:"
diff --git a/.github/workflows/cmake-exercise.yml b/.github/workflows/cmake-exercise.yml
index 9b65855..eda3aff 100644
--- a/.github/workflows/cmake-exercise.yml
+++ b/.github/workflows/cmake-exercise.yml
@@ -8,7 +8,7 @@ jobs:
   cmake-exercise:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: configure and build
         working-directory: topics/build_systems/code
diff --git a/.github/workflows/docker-exercise.yml b/.github/workflows/docker-exercise.yml
index 0649494..2332c2c 100644
--- a/.github/workflows/docker-exercise.yml
+++ b/.github/workflows/docker-exercise.yml
@@ -8,7 +8,7 @@ jobs:
   docker-exercise:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: build docker image
         working-directory: topics/docker/code/hostcontrold-solution
diff --git a/.github/workflows/document-compilation.yml b/.github/workflows/document-compilation.yml
index 882d146..f5c986b 100644
--- a/.github/workflows/document-compilation.yml
+++ b/.github/workflows/document-compilation.yml
@@ -13,7 +13,7 @@ jobs:
     env:
       DISPLAY: ":99"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: "start xvfb as a workaround for drawio-desktop does not work without an X server"
         run: Xvfb :99 &
diff --git a/.github/workflows/java-exercise.yml b/.github/workflows/java-exercise.yml
index 25f8293..65ba0df 100644
--- a/.github/workflows/java-exercise.yml
+++ b/.github/workflows/java-exercise.yml
@@ -11,7 +11,7 @@ jobs:
         java:
           - '21'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-java@v4
         with:
diff --git a/.github/workflows/link-check.yml b/.github/workflows/link-check.yml
index 12f3b0c..a2abcb0 100644
--- a/.github/workflows/link-check.yml
+++ b/.github/workflows/link-check.yml
@@ -9,7 +9,7 @@ jobs:
   link-check:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: tcort/github-action-markdown-link-check@v1
         with:
           use-quiet-mode: 'yes'
diff --git a/.github/workflows/pattern-examples.yml b/.github/workflows/pattern-examples.yml
index 862b234..0a6fcfd 100644
--- a/.github/workflows/pattern-examples.yml
+++ b/.github/workflows/pattern-examples.yml
@@ -11,7 +11,7 @@ jobs:
         java:
           - '21'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-java@v4
         with: