diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1ba4104e9..8c5de1e67 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
     permissions:
       contents: write # for git push
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - run: git push origin HEAD:v1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5f3e1f775..f30cb173d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -49,7 +49,7 @@ jobs:
     name: ${{ matrix.os }} ${{ matrix.ruby }}
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - uses: ./
       with:
@@ -150,7 +150,7 @@ jobs:
     name: "Test with no Gemfile"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: rm Gemfile
       - uses: ./
         with:
@@ -161,7 +161,7 @@ jobs:
     name: "Test rubygems: latest upgrades the default RubyGems version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -172,7 +172,7 @@ jobs:
     name: "Test rubygems: version upgrades RubyGems to that version if the default is older"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -183,7 +183,7 @@ jobs:
     name: "Test rubygems: version noops if the default is newer"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '3.1.0'
@@ -194,7 +194,7 @@ jobs:
     name: "Test rubygems: version uses the Bundler installed by the rubygems update"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: '3.1.0'
@@ -206,7 +206,7 @@ jobs:
     name: "Test bundler: 1.x for old Ruby"
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: '2.2'
@@ -217,7 +217,7 @@ jobs:
     name: "Test with a major Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -228,7 +228,7 @@ jobs:
     name: "Test with a minor Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -239,7 +239,7 @@ jobs:
     name: "Test with an exact Bundler version"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ./
       with:
         ruby-version: '2.6'
@@ -250,7 +250,7 @@ jobs:
     name: "Test with a Bundler pre/rc version"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: '2.6'
@@ -263,7 +263,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/bundler-dev.gemfile
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: ruby-head
@@ -275,7 +275,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/bundler1.gemfile
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: '2.7'
@@ -293,7 +293,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: '2.6'
@@ -306,7 +306,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/nokogiri.gemfile
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           ruby-version: truffleruby-head
@@ -316,7 +316,7 @@ jobs:
   lint:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: yarn install
     - run: yarn run package
     - name: Check generated files are up to date
diff --git a/README.md b/README.md
index 6c387a3f2..b57df9bda 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: '3.2' # Not needed with a .ruby-version file
@@ -92,7 +92,7 @@ jobs:
         ruby: ['2.7', '3.0', '3.1', '3.2', head, jruby, jruby-head, truffleruby, truffleruby-head]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
@@ -115,7 +115,7 @@ jobs:
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: '3.2'