diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bed68bf..a386f19 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: "${{ matrix.os }}"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v16
         with:
@@ -30,7 +30,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v16
         with:
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 65ba582..e03dbbc 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -10,7 +10,7 @@ jobs:
     name: Update Nix
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: main
       - uses: cachix/install-nix-action@v31