diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 35f65a5..c778a36 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     name: rustfmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -36,7 +36,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
@@ -51,7 +51,7 @@ jobs:
     name: feature-powerset
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - uses: taiki-e/install-action@cargo-hack
@@ -74,7 +74,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       # `--all-features` so the feature-gated tests (stats, limits) still run now
@@ -96,7 +96,7 @@ jobs:
     name: rustdoc
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       # The crate's docs are intra-doc-link dense; a broken link degrades the
@@ -123,7 +123,7 @@ jobs:
     name: cargo-deny
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       # Scan the dependency tree for security advisories, banned/duplicate
       # crates, and licenses outside the permissive allow-list (deny.toml).
       - uses: EmbarkStudios/cargo-deny-action@v2
@@ -134,7 +134,7 @@ jobs:
     name: msrv (1.88)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       # Verify the crate still builds on its declared Minimum Supported Rust
       # Version. Keep `toolchain` in sync with `rust-version` in Cargo.toml.
       # (`@master` + the `toolchain` input accepts a two-component "1.88"; the
@@ -161,7 +161,7 @@ jobs:
     name: public-api diff
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: Install cargo-public-api
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index be76c62..ed81537 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -74,7 +74,7 @@ jobs:
           app-id: ${{ vars.RELEASE_APP_ID }}
           private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # The guard above guarantees the dispatch ref is `main`; check it out
           # explicitly so the bump/tag/push below unambiguously target `main`.
diff --git a/.github/workflows/stress.yml b/.github/workflows/stress.yml
index 3bd3f2f..2e39786 100644
--- a/.github/workflows/stress.yml
+++ b/.github/workflows/stress.yml
@@ -27,7 +27,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       # `--all-features` so the cancellation-storm scenario is compiled and run.