diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 5bbf88e8..3efc788e 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -22,7 +22,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 43ad584c..5d56b6b3 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -19,7 +19,7 @@ jobs:
     steps:
       # Checkout repo sources.
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # Minimal build: create a single static HTML file.
       - name: Build docs (minimal)