diff --git a/.github/workflows/build-external-graphviz.yml b/.github/workflows/build-external-graphviz.yml
index ba1ce3a..1d14cba 100644
--- a/.github/workflows/build-external-graphviz.yml
+++ b/.github/workflows/build-external-graphviz.yml
@@ -57,7 +57,7 @@ jobs:
         run: echo "/opt/homebrew/opt/bison/bin" >> $GITHUB_PATH
 
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
diff --git a/.github/workflows/build-sanitizers.yml b/.github/workflows/build-sanitizers.yml
index 1fb4f5b..a247216 100644
--- a/.github/workflows/build-sanitizers.yml
+++ b/.github/workflows/build-sanitizers.yml
@@ -27,10 +27,10 @@ jobs:
             qt-flavor: asan_ubsan
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b880893..6467f0b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -74,13 +74,13 @@ jobs:
         if: ${{ runner.os == 'macOS' }}
         run: echo "/opt/homebrew/opt/bison/bin" >> $GITHUB_PATH
 
-      - uses: TheMrMilchmann/setup-msvc-dev@v3
+      - uses: TheMrMilchmann/setup-msvc-dev@v4
         if: ${{ runner.os == 'Windows' }}
         with:
           arch: x64
 
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
diff --git a/.github/workflows/create_release.yml b/.github/workflows/create_release.yml
index cb13a0a..cd3058a 100644
--- a/.github/workflows/create_release.yml
+++ b/.github/workflows/create_release.yml
@@ -25,12 +25,12 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
       - name: Checkout CI tools
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: KDABLabs/ci-release-tools
           path: ci-release-tools
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 269c898..ed03615 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -41,7 +41,7 @@ jobs:
           cache: true
 
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 
@@ -53,7 +53,7 @@ jobs:
           cmake --build ./build --target docs --verbose
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: build/docs/api/html/
 
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index f3d7a1f..dae615b 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -47,7 +47,7 @@ jobs:
           sudo apt update -qq
           echo ${{ join(matrix.config.apt_pgks, ' ') }} | xargs sudo apt install -y
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         #with:
           #ref: 'master' # schedule.cron do not allow branch setting
 
diff --git a/.github/workflows/submodule-bump.yml b/.github/workflows/submodule-bump.yml
index ff37db1..b9522f1 100644
--- a/.github/workflows/submodule-bump.yml
+++ b/.github/workflows/submodule-bump.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: false