diff --git a/bootstrap_helper.gemspec b/bootstrap_helper.gemspec
index 6e32030..28a3a67 100644
--- a/bootstrap_helper.gemspec
+++ b/bootstrap_helper.gemspec
@@ -15,13 +15,13 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = BootstrapHelper::Rails::VERSION
 
-  gem.add_dependency "railties", "4.0.0.rc1"
+  gem.add_dependency "railties", "~> 4.0.0.rc1"
   gem.add_dependency "thor",     "~> 0.14"
   gem.add_dependency "will_paginate", '>= 3.0.3'
   gem.add_development_dependency("rspec-rails")
   gem.add_development_dependency("capybara", ">= 0.4.0")
   gem.add_development_dependency("sqlite3")
   gem.add_development_dependency "bundler", ">= 1.3.0"
-  gem.add_development_dependency "rails",   "4.0.0.rc1"
+  gem.add_development_dependency "rails",   "~> 4.0.0.rc1"
 end