diff --git a/.github/workflows/build-iso.yml b/.github/workflows/build-iso.yml
index 1ee99e8..f256109 100644
--- a/.github/workflows/build-iso.yml
+++ b/.github/workflows/build-iso.yml
@@ -28,7 +28,7 @@ jobs:
     outputs:
       sha: ${{ steps.push.outputs.sha }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.head_ref || github.ref_name }}
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -61,7 +61,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: lint
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.lint.outputs.sha }}
 
@@ -89,7 +89,7 @@ jobs:
             runner: ubuntu-24.04-arm
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.lint.outputs.sha }}
 
@@ -126,7 +126,7 @@ jobs:
     needs: build
     if: github.ref != 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -185,7 +185,7 @@ jobs:
     needs: build
     if: github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 77085b6..0b5d1e1 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -12,7 +12,7 @@ jobs:
     name: Nix flake check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: cachix/install-nix-action@v27
         with: