diff --git a/rspec-json_expectations.gemspec b/rspec-json_expectations.gemspec
index 21b9866..44b2f1c 100644
--- a/rspec-json_expectations.gemspec
+++ b/rspec-json_expectations.gemspec
@@ -18,6 +18,9 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.add_runtime_dependency "rspec-expectations", ">= 3.2"
   spec.add_development_dependency "bundler", "~> 1.6"
+  spec.add_development_dependency "cucumber"
+  spec.add_development_dependency "rspec"
   spec.add_development_dependency "rake"
 end