diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index e2fffe9..0315962 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index b7e80dd..687f7cc 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@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/release-binaries.yml b/.github/workflows/release-binaries.yml
index 09bb871..7aac311 100644
--- a/.github/workflows/release-binaries.yml
+++ b/.github/workflows/release-binaries.yml
@@ -47,7 +47,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.inputs.tag || github.ref }}
 
diff --git a/.github/workflows/release-plz.yml b/.github/workflows/release-plz.yml
index 5b32cf2..50def2c 100644
--- a/.github/workflows/release-plz.yml
+++ b/.github/workflows/release-plz.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - &checkout
         name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/security-audit.yml b/.github/workflows/security-audit.yml
index 2951ff5..5c90df8 100644
--- a/.github/workflows/security-audit.yml
+++ b/.github/workflows/security-audit.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.sha }}
           fetch-depth: 1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3af9175..d1215ef 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
       contents: "read"
     steps:
       # - run: id
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ (github.event_name == 'workflow_run' && github.event.workflow_run.head_sha) || github.sha }}
           repository: ${{ github.repository }}