diff --git a/tasks/gem.rake b/tasks/gem.rake
index 4d9dee2e..0919afc6 100644
--- a/tasks/gem.rake
+++ b/tasks/gem.rake
@@ -19,7 +19,7 @@ namespace :gem do
       exit(1)
     end
 
-    s.required_ruby_version = ">= 2.0"
+    s.required_ruby_version = ">= 2.2"
 
     s.add_runtime_dependency "public_suffix", ">= 2.0.2", "< 5.0"
     s.add_development_dependency "bundler", ">= 1.0", "< 3.0"