groupdate.gemspec in groupdate-4.0.0 vs groupdate.gemspec in groupdate-4.0.1

@@ -15,10 +15,12 @@
   spec.files         = `git ls-files`.split($/)
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = ">= 2.2.0"
+
   spec.add_dependency "activesupport", ">= 4.2"
 
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "minitest"
@@ -28,9 +30,9 @@
     spec.add_development_dependency "activerecord-jdbcpostgresql-adapter"
     spec.add_development_dependency "activerecord-jdbcmysql-adapter"
     spec.add_development_dependency "activerecord-jdbcsqlite3-adapter"
   else
     spec.add_development_dependency "pg", "< 1"
-    spec.add_development_dependency "mysql2"
+    spec.add_development_dependency "mysql2", "< 0.5"
     spec.add_development_dependency "sqlite3"
   end
 end