diff --git a/tdameritrade-api-ruby.gemspec b/tdameritrade-api-ruby.gemspec
index f7005a8..ca49644 100644
--- a/tdameritrade-api-ruby.gemspec
+++ b/tdameritrade-api-ruby.gemspec
@@ -20,11 +20,11 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "bundler", "~> 1.5"
+  spec.add_dependency "bundler"
   spec.add_dependency "rake"
   spec.add_dependency "hashie"
   spec.add_dependency "httparty", "~> 0.13"
-  spec.add_dependency "activesupport", "~> 4.0"
+  spec.add_dependency "activesupport"
   spec.add_dependency "nokogiri", "~> 1.6"
 
   spec.add_development_dependency "clipboard"