diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d5d5219..e2a6e02 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
     name: Ruby ${{ matrix.version }}
     strategy:
       matrix:
-        version: [3.0, 3.1, 3.2]
+        version: [3.0, 3.1, 3.2, 3.3]
 
     steps:
       - uses: actions/checkout@v2