diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 576413c..ff26eed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,7 @@ jobs:
           - "2.6"
           - "2.7"
           - "3.0"
+          - "3.1"
           - "jruby-9.2"
 
     steps: