diff --git a/templates/grpc.gemspec.template b/templates/grpc.gemspec.template
index a5e0801296d..ac543af7a64 100644
--- a/templates/grpc.gemspec.template
+++ b/templates/grpc.gemspec.template
@@ -15,7 +15,7 @@
     s.description   = 'Send RPCs from Ruby using GRPC'
     s.license       = 'Apache-2.0'
 
-    s.required_ruby_version = '>= 2.3.0'
+    s.required_ruby_version = '>= 2.4.0'
 
     s.files = %w( Makefile .yardopts )
     s.files += %w( etc/roots.pem )