diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 72c30f6..f8845f5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -45,6 +45,7 @@ jobs:
           - 3.0
           - 3.1
           - 3.2
+          - 3.3
           - head
     runs-on: ${{ matrix.os }}
     steps:
@@ -80,7 +81,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1.165.1
         with:
-          ruby-version: 3.2
+          ruby-version: 3.3
           bundler-cache: true
 
       - name: Yard documents