diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0b53f32..98b7475 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -55,7 +55,7 @@ jobs:
     name: tests without NumPy (zero-dependency core)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -73,7 +73,7 @@ jobs:
     name: build web playground
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -101,7 +101,7 @@ jobs:
   docker-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Build Docker image
         run: docker build -t ragforge:ci .
       - name: Smoke test Docker container
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index 2090c33..1e679c5 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -28,7 +28,7 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index a63bade..548171d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"