diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bc12236..5d284e6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
     name: rustfmt (stable)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -34,7 +34,7 @@ jobs:
     name: clippy (strict)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
@@ -50,7 +50,7 @@ jobs:
         os:   [ubuntu-latest, macos-latest, windows-latest]
         rust: [stable]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
@@ -64,7 +64,7 @@ jobs:
     env:
       RUSTDOCFLAGS: "-D warnings"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: xtask gen-readmes drift check
@@ -75,7 +75,7 @@ jobs:
     name: deny + machete
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: EmbarkStudios/cargo-deny-action@v2
       - uses: taiki-e/install-action@v2
@@ -86,7 +86,7 @@ jobs:
     name: coverage (llvm-cov)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with: { components: llvm-tools-preview }
       - uses: Swatinem/rust-cache@v2