Gemfile in hash-utils-1.0.0 vs Gemfile in hash-utils-2.0.0

@@ -5,8 +5,8 @@
 
 # Add dependencies to develop your gem here.
 # Include everything needed to run rake, tests, features, etc.
 group :development do
   gem "bundler", ">= 1.0.0"
-  gem "jeweler", ">= 1.5.2"
+  gem "jeweler2", ">= 2.0.0"
   gem "riot", ">= 0.12.3"
 end