diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a458aa..f981170 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     name: Base steps
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Check Whitespace
       run: git diff --check -- HEAD~1
   ruby-unit-spec:
@@ -22,7 +22,7 @@ jobs:
         ruby: [ruby-3.0, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -38,7 +38,7 @@ jobs:
         ruby: [ruby-3.0, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: ruby/setup-ruby@v1
@@ -56,7 +56,7 @@ jobs:
         ruby: [ruby-3.0, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -72,7 +72,7 @@ jobs:
         ruby: [ruby-3.0, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -88,7 +88,7 @@ jobs:
         ruby: [ruby-3.0, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true