diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f07fda8..73c2cd3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, ubuntu-22.04]
-        ruby-version: ['3.0', '3.1', '3.2']
+        ruby-version: ['3.0', '3.1', '3.2', '3.3']
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3