diff --git a/hiraoyogi.gemspec b/hiraoyogi.gemspec
index 1ed9023..28b57fc 100644
--- a/hiraoyogi.gemspec
+++ b/hiraoyogi.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "guard-bundler"
   spec.add_development_dependency "guard-rspec"
   spec.add_development_dependency "rake"
-  spec.add_development_dependency "rspec"
+  spec.add_development_dependency "rspec", "~> 3.0.0"
   spec.add_development_dependency "terminal-notifier-guard"
   spec.add_development_dependency "webmock"
 end