diff --git a/.github/workflows/browserstack.yaml b/.github/workflows/browserstack.yaml
index c0c288bef..e6674778b 100644
--- a/.github/workflows/browserstack.yaml
+++ b/.github/workflows/browserstack.yaml
@@ -30,7 +30,7 @@ jobs:
         # Job and step conditions do not have access to secrets or the environment.
         # This step makes presence of the browserstack credentials available as a step output.
         run: (test -n "${BROWSERSTACK_USERNAME}" && echo present=1 || echo present=0) >> $GITHUB_OUTPUT
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: (steps.credentials.outputs.present == '1')
       - uses: actions/setup-node@v6
         if: (steps.credentials.outputs.present == '1')
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 97f282fee..c10f66ad5 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -37,7 +37,7 @@ jobs:
             diff-check: true
     name: ${{ matrix.task }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version-file: .nvmrc
@@ -60,7 +60,7 @@ jobs:
         node-version: [24.x, 22.x, 20.x]
     name: "test on Node.js ${{ matrix.node-version }}"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
diff --git a/.github/workflows/conformance-cloudflare.yaml b/.github/workflows/conformance-cloudflare.yaml
index 2c4756d6b..55d716a7a 100644
--- a/.github/workflows/conformance-cloudflare.yaml
+++ b/.github/workflows/conformance-cloudflare.yaml
@@ -23,7 +23,7 @@ jobs:
     runs-on: conformance
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/cache@v4
         with:
           path: .turbo
diff --git a/.github/workflows/conformance-express.yaml b/.github/workflows/conformance-express.yaml
index b16af5e24..a81c72d05 100644
--- a/.github/workflows/conformance-express.yaml
+++ b/.github/workflows/conformance-express.yaml
@@ -25,7 +25,7 @@ jobs:
     name: "Node.js ${{ matrix.node-version }}"
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
diff --git a/.github/workflows/conformance-fastify.yaml b/.github/workflows/conformance-fastify.yaml
index 476013c43..29892b979 100644
--- a/.github/workflows/conformance-fastify.yaml
+++ b/.github/workflows/conformance-fastify.yaml
@@ -26,7 +26,7 @@ jobs:
     name: "Node.js ${{ matrix.node-version }}"
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
diff --git a/.github/workflows/conformance-node.yaml b/.github/workflows/conformance-node.yaml
index 451672f3a..75cba9771 100644
--- a/.github/workflows/conformance-node.yaml
+++ b/.github/workflows/conformance-node.yaml
@@ -26,7 +26,7 @@ jobs:
     name: "Node.js ${{ matrix.node-version }} ${{ matrix.side }}"
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
diff --git a/.github/workflows/conformance-web.yaml b/.github/workflows/conformance-web.yaml
index 95b62731a..7750d252c 100644
--- a/.github/workflows/conformance-web.yaml
+++ b/.github/workflows/conformance-web.yaml
@@ -26,7 +26,7 @@ jobs:
     name: "Node.js ${{ matrix.node-version }} ${{ matrix.client }}"
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}