diff --git a/.github/workflows/stable.yml b/.github/workflows/stable.yml
index b5691f9d..6dcfe75e 100644
--- a/.github/workflows/stable.yml
+++ b/.github/workflows/stable.yml
@@ -21,6 +21,7 @@ jobs:
           - '3.1'
           - '3.2'
           - '3.3'
+          - '3.4'
           - jruby-9.4
           - truffleruby