diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 877e27f23..7722cb168 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -10,7 +10,7 @@ jobs:
   nix_lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4      
+    - uses: actions/checkout@v5      
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |
@@ -23,7 +23,7 @@ jobs:
   nix_check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |
@@ -38,7 +38,7 @@ jobs:
     outputs:
       matrix: ${{ steps.job-matrix.outputs.matrix }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |
@@ -54,7 +54,7 @@ jobs:
     outputs:
       matrix: ${{ steps.job-matrix.outputs.matrix }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |
@@ -71,7 +71,7 @@ jobs:
     strategy:
       matrix: ${{ fromJson(needs.pkgs_x86_64_linux.outputs.matrix) }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index cdabd4215..1b967dccd 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -27,7 +27,7 @@ jobs:
     
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 09c2d0988..50723eac3 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/hcloud-cost-mgmt.yaml b/.github/workflows/hcloud-cost-mgmt.yaml
index 0b8d36bc6..8f9eaaa23 100644
--- a/.github/workflows/hcloud-cost-mgmt.yaml
+++ b/.github/workflows/hcloud-cost-mgmt.yaml
@@ -12,7 +12,7 @@ jobs:
       id-token: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - uses: google-github-actions/auth@v2
       with:
diff --git a/.github/workflows/hcloud-dev.yaml b/.github/workflows/hcloud-dev.yaml
index f0a83b2d4..191b3609f 100644
--- a/.github/workflows/hcloud-dev.yaml
+++ b/.github/workflows/hcloud-dev.yaml
@@ -29,7 +29,7 @@ jobs:
     needs: create-runner
     runs-on: ${{ needs.create-runner.outputs.server-name }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - uses: google-github-actions/auth@v2
       with:
diff --git a/.github/workflows/update.yaml b/.github/workflows/update.yaml
index e1d775875..4d1668d95 100644
--- a/.github/workflows/update.yaml
+++ b/.github/workflows/update.yaml
@@ -9,7 +9,7 @@ jobs:
   update-packages:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: DeterminateSystems/nix-installer-action@v17
       with:
         extra-conf: |