diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index cb124aabd..2a5cb641a 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, 'ci skip')"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Audit Check
         # https://github.com/rustsec/audit-check/issues/2
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 35d202dd6..b22f53c8a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -97,7 +97,7 @@ jobs:
           - ubuntu-latest
           - macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -129,7 +129,7 @@ jobs:
           - ubuntu-latest
           - macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -159,7 +159,7 @@ jobs:
           - ubuntu-latest
           - macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -200,7 +200,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -222,7 +222,7 @@ jobs:
     name: test tokio instrumentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -247,7 +247,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -286,7 +286,7 @@ jobs:
           - os: ubuntu-latest
           - os: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -320,7 +320,7 @@ jobs:
         include:
           - os: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -354,7 +354,7 @@ jobs:
         include:
           - os: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -382,7 +382,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -403,7 +403,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install llvm
         # Required to resolve symbols in sanitizer output
         run: sudo apt-get install -y llvm
@@ -425,7 +425,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
@@ -443,7 +443,7 @@ jobs:
           - powerpc64-unknown-linux-gnu
           - arm-linux-androideabi
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -465,7 +465,7 @@ jobs:
           - name: armv7-sony-vita-newlibeabihf
             exclude_features: "process,signal,rt-process-signal,full"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@nightly
         with:
@@ -493,7 +493,7 @@ jobs:
           - target: aarch64-unknown-linux-gnu
             rustflags: --cfg tokio_taskdump
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -532,7 +532,7 @@ jobs:
           - target: aarch64-unknown-linux-gnu
             rustflags: --cfg tokio_taskdump
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -568,7 +568,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -598,7 +598,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -631,7 +631,7 @@ jobs:
           # Try with unstable and taskdump feature flags
           - { name: "--unstable --taskdump", rustflags: "--cfg tokio_unstable -Dwarnings --cfg tokio_taskdump" }
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -650,7 +650,7 @@ jobs:
     name: minrust
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_min }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -666,7 +666,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -698,7 +698,7 @@ jobs:
     name: fmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -718,7 +718,7 @@ jobs:
     name: clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_clippy }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -733,7 +733,7 @@ jobs:
     name: docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -751,7 +751,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -767,7 +767,7 @@ jobs:
     name: Check README
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Verify that both READMEs are identical
         run: diff README.md tokio/README.md
 
@@ -786,7 +786,7 @@ jobs:
           - ubuntu-latest
           - macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -832,7 +832,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -849,7 +849,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@master
         with:
@@ -864,7 +864,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -882,7 +882,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -933,7 +933,7 @@ jobs:
           # the README for details: https://github.com/awslabs/cargo-check-external-types
           - nightly-2023-05-31
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ matrix.rust }}
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -952,7 +952,7 @@ jobs:
     needs: basics
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_nightly }}
         uses: dtolnay/rust-toolchain@stable
         with:
diff --git a/.github/workflows/loom.yml b/.github/workflows/loom.yml
index e75280902..b25f9ac5e 100644
--- a/.github/workflows/loom.yml
+++ b/.github/workflows/loom.yml
@@ -29,7 +29,7 @@ jobs:
     if: github.repository_owner == 'tokio-rs' && (contains(github.event.pull_request.labels.*.name, 'R-loom-sync') || (github.base_ref == null))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with:
@@ -45,7 +45,7 @@ jobs:
     if: github.repository_owner == 'tokio-rs' && (contains(github.event.pull_request.labels.*.name, 'R-loom-time-driver') || (github.base_ref == null))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with:
@@ -61,7 +61,7 @@ jobs:
     if: github.repository_owner == 'tokio-rs' && (contains(github.event.pull_request.labels.*.name, 'R-loom-current-thread') || (github.base_ref == null))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with:
@@ -84,7 +84,7 @@ jobs:
           - scope: loom_multi_thread::group_c
           - scope: loom_multi_thread::group_d
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with:
@@ -109,7 +109,7 @@ jobs:
           - scope: loom_multi_thread_alt::group_c
           - scope: loom_multi_thread_alt::group_d
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/pr-audit.yml b/.github/workflows/pr-audit.yml
index 892cb0cfa..ce2e81cda 100644
--- a/.github/workflows/pr-audit.yml
+++ b/.github/workflows/pr-audit.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, 'ci skip')"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install cargo-audit
         run: cargo install cargo-audit
diff --git a/.github/workflows/stress-test.yml b/.github/workflows/stress-test.yml
index 1c21bc914..e5c13f6f4 100644
--- a/.github/workflows/stress-test.yml
+++ b/.github/workflows/stress-test.yml
@@ -27,7 +27,7 @@ jobs:
         stress-test:
           - simple_echo_tcp
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust ${{ env.rust_stable }}
         uses: dtolnay/rust-toolchain@master
         with: