diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 920aff3..885b399 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v4
       - name: Ruff check
         run: uvx ruff check kos/ tests/ examples/
@@ -19,7 +19,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v4
       - name: Install
         run: uv sync --extra dev
@@ -29,7 +29,7 @@ jobs:
   notebook-pairing-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: astral-sh/setup-uv@v4
       - name: Verify jupytext-paired examples are in sync
         run: |