diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 539e8b3..4470b91 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,10 +13,10 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0', '3.1', '3.2']
+        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3']
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: