diff --git a/.github/workflows/changed.yml b/.github/workflows/changed.yml
index 7bf4b01..a127311 100644
--- a/.github/workflows/changed.yml
+++ b/.github/workflows/changed.yml
@@ -4,7 +4,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: tj-actions/changed-files@v39
diff --git a/.github/workflows/checkers.yml b/.github/workflows/checkers.yml
index 930ab6b..9c2c473 100644
--- a/.github/workflows/checkers.yml
+++ b/.github/workflows/checkers.yml
@@ -12,7 +12,7 @@ jobs:
   linkcheck:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: JustinBeckwith/linkinator-action@v1.10.4
       with:
         paths: '*.md'
@@ -21,7 +21,7 @@ jobs:
   spellcheck:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: tbroadley/spellchecker-cli-action@v1
       with:
         dictionaries: '.github/dictionary.txt'
diff --git a/.github/workflows/example.yml b/.github/workflows/example.yml
index 4eae510..dd2341c 100644
--- a/.github/workflows/example.yml
+++ b/.github/workflows/example.yml
@@ -4,7 +4,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: DavidAnson/markdownlint-cli2-action@v12
       with:
         globs: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d7401ec..69e4596 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     name: Run test script
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@v3
     - run: npm install
     - run: npm run test
@@ -18,13 +18,13 @@ jobs:
     name: No globs (README.md, 0 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
   one-glob-file:
     name: One glob (test/errors.md, 3 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         globs: test/errors.md
@@ -36,7 +36,7 @@ jobs:
     name: One glob (README.md, 0 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         globs: '*.md'
@@ -44,7 +44,7 @@ jobs:
     name: Two globs (README.md and test/errors.md, 3 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         globs: |
@@ -58,7 +58,7 @@ jobs:
     name: Separator (README.md and test/errors.md, 3 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         globs: '*.md,test/*'
@@ -71,7 +71,7 @@ jobs:
     name: Command = config (test/errors.md, 2 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: rm .markdownlint.json
     - uses: ./
       with:
@@ -87,7 +87,7 @@ jobs:
     name: Command = config (invalid configuration file, fails)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         command: config
@@ -102,7 +102,7 @@ jobs:
     name: Command = config (missing configuration file, fails)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         command: config
@@ -114,7 +114,7 @@ jobs:
     name: Command = fix (test/errors.md, 0 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         command: fix
@@ -123,7 +123,7 @@ jobs:
     name: Command = unsupported (fails)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         command: unsupported
@@ -135,7 +135,7 @@ jobs:
     name: config (test/errors.md, 2 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: rm .markdownlint.json
     - uses: ./
       with:
@@ -149,7 +149,7 @@ jobs:
     name: config (invalid configuration file, fails)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         config: 'invalid.markdownlint.jsonc'
@@ -162,7 +162,7 @@ jobs:
     name: fix (test/errors.md, 0 errors)
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         fix: true