diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 01522e9..6614165 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     name: stable / fmt
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable
@@ -28,7 +28,7 @@ jobs:
       matrix:
         toolchain: [stable, beta]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     name: nightly / doc
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -60,7 +60,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu / stable / features
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable
@@ -81,7 +81,7 @@ jobs:
         msrv: [1.40.0]
     name: ubuntu / ${{ matrix.msrv }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.msrv }}
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 591476c..bd1f176 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -10,7 +10,7 @@ jobs:
       image: xd009642/tarpaulin:develop-nightly
       options: --security-opt seccomp=unconfined
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Generate code coverage
         run: |
           cargo +nightly tarpaulin --verbose --all-features --workspace --timeout 120 --run-types Doctests --run-types Tests --out Xml
diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index fa7ffe3..3bc15b8 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -7,7 +7,7 @@ jobs:
   sanitizers:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -42,7 +42,7 @@ jobs:
   miri:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - run: |
@@ -62,7 +62,7 @@ jobs:
   loom:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable
diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index e341e9b..1e4eb0a 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu / nightly
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -35,7 +35,7 @@ jobs:
     # Unfortunately, hashFiles only works in if on steps, so we reepeat it.
     # if: hashFiles('Cargo.lock') != ''
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install beta
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bd04939..96fd088 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         toolchain: [stable, beta]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu / stable / minimal-versions
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable
@@ -61,7 +61,7 @@ jobs:
       matrix:
         os: [macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable