diff --git a/.github/workflows/ci_coverage.yml b/.github/workflows/ci_coverage.yml
index 56305c8e..08afa177 100644
--- a/.github/workflows/ci_coverage.yml
+++ b/.github/workflows/ci_coverage.yml
@@ -36,7 +36,7 @@ jobs:
         - /home/runner:/home/runner
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/ci_documentation.yml b/.github/workflows/ci_documentation.yml
index fa59b329..40422c77 100644
--- a/.github/workflows/ci_documentation.yml
+++ b/.github/workflows/ci_documentation.yml
@@ -29,12 +29,12 @@ jobs:
     steps:
       - name: Checkout
         if: github.event_name != 'pull_request_target'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # pull_request_target does not checkout the merge commit by default
       - name: Checkout
         if: github.event_name == 'pull_request_target'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: "refs/pull/${{ github.event.number }}/merge"
 
diff --git a/.github/workflows/ci_header.yml b/.github/workflows/ci_header.yml
index b0a4fc58..22aacb90 100644
--- a/.github/workflows/ci_header.yml
+++ b/.github/workflows/ci_header.yml
@@ -36,7 +36,7 @@ jobs:
         - /home/runner:/home/runner
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup cache
         uses: seqan/actions/setup-actions-cache@main
diff --git a/.github/workflows/ci_linux.yml b/.github/workflows/ci_linux.yml
index 1a6ebffa..30f00799 100644
--- a/.github/workflows/ci_linux.yml
+++ b/.github/workflows/ci_linux.yml
@@ -36,7 +36,7 @@ jobs:
         - /home/runner:/home/runner
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup cache
         uses: seqan/actions/setup-actions-cache@main
diff --git a/.github/workflows/ci_macos.yml b/.github/workflows/ci_macos.yml
index b4ad2e85..4ca1ec27 100644
--- a/.github/workflows/ci_macos.yml
+++ b/.github/workflows/ci_macos.yml
@@ -32,7 +32,7 @@ jobs:
         compiler: ["clang-latest", "clang-second-latest", "clang-third-latest", "gcc-latest", "gcc-second-latest", "gcc-third-latest"]
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup toolchain
         uses: seqan/actions/setup-toolchain@main
diff --git a/.github/workflows/cron_codeql.yml b/.github/workflows/cron_codeql.yml
index 154db3f7..60c41e0e 100644
--- a/.github/workflows/cron_codeql.yml
+++ b/.github/workflows/cron_codeql.yml
@@ -28,7 +28,7 @@ jobs:
       image: ghcr.io/seqan/gcc-second-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v4
diff --git a/.github/workflows/cron_sanitizer.yml b/.github/workflows/cron_sanitizer.yml
index 4ffac182..2c8e33e2 100644
--- a/.github/workflows/cron_sanitizer.yml
+++ b/.github/workflows/cron_sanitizer.yml
@@ -71,7 +71,7 @@ jobs:
         - /home/runner:/home/runner
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup compiler
         if: contains(matrix.os, 'macos')