diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bb29dc3..22f6a78 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        ruby: [2.5, 2.6, 2.7, '3.0', '3.1', head, jruby, jruby-head, truffleruby]
+        ruby: [2.5, 2.6, 2.7, '3.0', '3.1', '3.2', '3.3', head, jruby, jruby-head, truffleruby]
     runs-on: ${{ matrix.os }}
     env:
       JRUBY_OPTS: -J-Xss16m