diff --git a/statesman.gemspec b/statesman.gemspec
index f0d6c8d5..fd13f307 100644
--- a/statesman.gemspec
+++ b/statesman.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.1"
   spec.add_development_dependency "rspec-its", "~> 1.1"
   spec.add_development_dependency "rspec_junit_formatter", "~> 0.5.1"
-  spec.add_development_dependency "rspec-rails", "~> 3.1"
+  spec.add_development_dependency "rspec-rails", "~> 5.1"
   spec.add_development_dependency "sqlite3", "~> 1.4.2"
   spec.add_development_dependency "timecop", "~> 0.9.1"