diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2034140..482e346 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install clang-format
         run: sudo apt-get install -y clang-format
@@ -76,7 +76,7 @@ jobs:
               CONFIG_ISOTP=y
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python (for west)
         uses: actions/setup-python@v5
@@ -111,7 +111,7 @@ jobs:
     if: false  # Re-enable when tests/build_check/CMakeLists.txt exists (Phase 2+)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Python (for west)
         uses: actions/setup-python@v5