diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fc94c16..fd2aa28 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.7', '3.0', '3.1', '3.2', 'jruby-head']
+        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3', 'jruby-head']
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - run: rm Gemfile.lock
 
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@v1
         with: