Gemfile in mixlib-install-3.9.3 vs Gemfile in mixlib-install-3.9.4

@@ -13,10 +13,10 @@
   gem "climate_control"
 end
 
 if RUBY_VERSION =~ /^2/
   group :chefstyle do
-    gem "chefstyle"
+    gem "chefstyle", "~> 0.4.0"
   end
 end
 
 instance_eval(ENV["GEMFILE_MOD"]) if ENV["GEMFILE_MOD"]