diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2484dbf..933179a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     name: macOS (Swift 6.2, debug)
     runs-on: macos-26
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Select Xcode 26.0
         run: sudo xcode-select -s /Applications/Xcode_26.0.app
@@ -57,7 +57,7 @@ jobs:
     runs-on: ubuntu-latest
     container: swift:6.2
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Cache Swift packages
         uses: actions/cache@v4
@@ -77,7 +77,7 @@ jobs:
     runs-on: ubuntu-latest
     container: swift:6.0
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Cache Swift packages
         uses: actions/cache@v4
diff --git a/.github/workflows/swift-format.yml b/.github/workflows/swift-format.yml
index a3a5cb0..63af23b 100644
--- a/.github/workflows/swift-format.yml
+++ b/.github/workflows/swift-format.yml
@@ -17,7 +17,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.head_ref || github.ref_name }}
 
diff --git a/.github/workflows/swiftlint.yml b/.github/workflows/swiftlint.yml
index 8c31ea2..2930f2e 100644
--- a/.github/workflows/swiftlint.yml
+++ b/.github/workflows/swiftlint.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     container: swift:6.2
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Restore swiftlint cache
         id: cache-swiftlint-restore