diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 6b37927..418b6df 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     name: nightly / fmt
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -30,7 +30,7 @@ jobs:
       matrix:
         toolchain: [nightly]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     name: nightly / doc
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu / nightly / features
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -79,7 +79,7 @@ jobs:
 #       msrv: [1.61.0] # `impl Trait` requires this
 #   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/nostd.yml b/.github/workflows/nostd.yml
index 3f75013..b2e711c 100644
--- a/.github/workflows/nostd.yml
+++ b/.github/workflows/nostd.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         target: [thumbv7m-none-eabi, aarch64-unknown-none]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index 797e69a..9b0f828 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -9,7 +9,7 @@ jobs:
   sanitizers:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -38,7 +38,7 @@ jobs:
   miri:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - run: |
@@ -55,7 +55,7 @@ jobs:
 # loom:
 #   runs-on: ubuntu-latest
 #   steps:
-#     - uses: actions/checkout@v3
+#     - uses: actions/checkout@v4
 #       with:
 #         submodules: true
 #     - name: Install nightly
diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index 3762b2c..e9dc537 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     name: ubuntu / nightly
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -34,7 +34,7 @@ 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 nightly
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d2aff82..96f1f81 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         toolchain: [nightly]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -38,7 +38,7 @@ jobs:
       matrix:
         os: [macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly