diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index eb6ca4193..2c4f5d815 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -18,7 +18,7 @@ jobs:
   test-ubuntu:
     strategy:
       matrix:
-        ruby: [2.4.0, 2.4, 2.5, 2.6, 2.7, "3.0", jruby-9.2]
+        ruby: [2.3.0, 2.3, 2.4, 2.5, 2.6, 2.7, "3.0", jruby-9.2]
 
     runs-on: ubuntu-latest