diff --git a/.github/workflows/build-docset.yml b/.github/workflows/build-docset.yml
index d7bb12a60..ec0230d08 100644
--- a/.github/workflows/build-docset.yml
+++ b/.github/workflows/build-docset.yml
@@ -17,7 +17,7 @@ jobs:
   docset:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v4
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bbf6caee2..e6f8aef09 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,7 +39,7 @@ jobs:
           - "pypy-3.10"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -80,7 +80,7 @@ jobs:
     needs: tests
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version-file: .python-version-default
@@ -115,7 +115,7 @@ jobs:
     name: Build docs & run doctests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           # Keep in sync with tox/docs and .readthedocs.yaml.
@@ -129,7 +129,7 @@ jobs:
     name: Check types using pyright
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version-file: .python-version-default
@@ -146,7 +146,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version-file: .python-version-default
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index f9e168b90..f75fafa5b 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2
diff --git a/.github/workflows/pypi-package.yml b/.github/workflows/pypi-package.yml
index 0c056c1a8..35938dcbd 100644
--- a/.github/workflows/pypi-package.yml
+++ b/.github/workflows/pypi-package.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0