diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5064ca245..3e0e2bd48 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -48,7 +48,7 @@ jobs:
             target: i686-unknown-linux-gnu
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
         run: rustup update nightly --no-self-update && rustup default nightly
@@ -71,7 +71,7 @@ jobs:
           - '1.36'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
       # cargo does not support for --features/--no-default-features with workspace, so use cargo-hack instead.
@@ -105,7 +105,7 @@ jobs:
           - '1.56'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
       - name: Install cargo-hack
@@ -137,7 +137,7 @@ jobs:
           - nightly
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
       - name: Install cargo-hack
@@ -149,7 +149,7 @@ jobs:
     name: cargo minimal-versions build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - name: Install cargo-hack
@@ -170,7 +170,7 @@ jobs:
           - thumbv6m-none-eabi
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - run: rustup target add ${{ matrix.target }}
@@ -202,7 +202,7 @@ jobs:
     name: cargo bench
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - run: cargo bench --workspace
@@ -212,7 +212,7 @@ jobs:
     name: cargo hack check --feature-powerset
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - name: Install cargo-hack
@@ -237,7 +237,7 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - run: ci/no_atomic_cas.sh
@@ -270,7 +270,7 @@ jobs:
     name: cargo miri test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup toolchain install nightly --component miri && rustup default nightly
       - run: cargo miri test --workspace --all-features
@@ -289,7 +289,7 @@ jobs:
           - thread
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup toolchain install nightly --component rust-src && rustup default nightly
       - run: cargo -Z build-std test --workspace --all-features --target x86_64-unknown-linux-gnu --lib --tests
@@ -303,7 +303,7 @@ jobs:
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup toolchain install nightly --component clippy && rustup default nightly
       - run: cargo clippy --workspace --all-features --all-targets
@@ -312,7 +312,7 @@ jobs:
     name: cargo fmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update stable
       - run: cargo fmt --all -- --check
@@ -321,7 +321,7 @@ jobs:
     name: cargo doc
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update nightly && rustup default nightly
       - run: RUSTDOCFLAGS="-D warnings --cfg docsrs" cargo doc --workspace --no-deps --all-features