qa_server.gemspec in qa_server-4.0.0 vs qa_server.gemspec in qa_server-5.0.0

@@ -23,10 +23,10 @@
   # minor version releases can include breaking changes; see
   # http://guides.rubyonrails.org/maintenance_policy.html
   spec.add_dependency 'rails', '~> 5.0' # Keep in sync with version supported by Hyrax
 
   # Required gems for QA and linked data access
-  spec.add_development_dependency 'qa', '~> 4.2'
+  spec.add_development_dependency 'qa', '~> 5.1' # required for response_header
   spec.add_development_dependency 'linkeddata'
 
   # Produces dashboard charts on monitor status page
   spec.add_dependency 'gruff'