diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 12d8e7f..e2ad06e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [2.6, 2.7, "3.0", 3.1, 3.2]
+        ruby-version: [2.6, 2.7, "3.0", 3.1, 3.2, 3.3]
         bundler-version: [2.4.19, 2.4.22, 2.5.10]
         exclude:
           - ruby-version: 2.6