diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0102d715..87ca044b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install uv
         uses: astral-sh/setup-uv@v7
         with:
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 205b0fe2..abd1b9b1 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 412cef9e..687f7cc5 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ 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/publish-client.yml b/.github/workflows/publish-client.yml
index 8fb37f82..0f60b8eb 100644
--- a/.github/workflows/publish-client.yml
+++ b/.github/workflows/publish-client.yml
@@ -15,7 +15,7 @@ jobs:
         working-directory: adit-client
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install uv
         uses: astral-sh/setup-uv@v7
         with:
diff --git a/.github/workflows/push-image.yml b/.github/workflows/push-image.yml
index 8c5c5acf..9069b1a6 100644
--- a/.github/workflows/push-image.yml
+++ b/.github/workflows/push-image.yml
@@ -13,7 +13,7 @@ jobs:
       packages: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3
         with: