diff --git a/rails-dom-testing.gemspec b/rails-dom-testing.gemspec
index ede17b6..a6b4899 100644
--- a/rails-dom-testing.gemspec
+++ b/rails-dom-testing.gemspec
@@ -17,10 +17,10 @@ Gem::Specification.new do |spec|
   spec.test_files    = Dir["test/**/*"]
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "nokogiri", "~> 1.6"
-  spec.add_dependency "activesupport",  ">= 4.2.0", "< 6.0"
+  spec.add_dependency "nokogiri", ">= 1.6"
+  spec.add_dependency "activesupport",  ">= 4.2.0"
 
-  spec.add_development_dependency "bundler", "~> 1.3"
+  spec.add_development_dependency "bundler", ">= 1.3"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "minitest"
 end