diff --git a/.github/workflows/ai_review.yml b/.github/workflows/ai_review.yml
index e3677c0..898c938 100644
--- a/.github/workflows/ai_review.yml
+++ b/.github/workflows/ai_review.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Load review issue context
         id: issue_context
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f4a105..41410c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/monthly_publish.yml b/.github/workflows/monthly_publish.yml
index 51bdbee..25c636e 100644
--- a/.github/workflows/monthly_publish.yml
+++ b/.github/workflows/monthly_publish.yml
@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set Up Python
         uses: actions/setup-python@v6