netsoul.gemspec in netsoul-2.4.4 vs netsoul.gemspec in netsoul-2.4.5

@@ -31,8 +31,8 @@
   spec.add_development_dependency 'rubocop'.freeze, '~> 0'.freeze
   spec.add_development_dependency 'rspec'.freeze, '~> 3.3'.freeze
   spec.add_development_dependency 'simplecov'.freeze, '~> 0'.freeze
   spec.add_development_dependency 'coveralls'.freeze, '~> 0'.freeze
   spec.add_development_dependency 'yard'.freeze, '~> 0'.freeze
-  spec.add_development_dependency 'memory_profiler'.freeze, '~> 0'.freeze
+  spec.add_development_dependency 'memory_profiler'.freeze, '~> 0'.freeze if RUBY_VERSION >= '2.1.0'
   spec.add_development_dependency 'rake-compiler'.freeze, '~> 0.9.5'.freeze
 end