Gemfile in blacklight-5.7.1 vs Gemfile in blacklight-5.7.2

@@ -21,7 +21,12 @@
   instance_eval File.read(file)
 else
   gem 'rails', ENV['RAILS_VERSION'] if ENV['RAILS_VERSION']
 
   # explicitly include sass-rails to get compatible sprocket dependencies
-  gem 'sass-rails'
+  if ENV['RAILS_VERSION'] and ENV['RAILS_VERSION'] =~ /^4.2/
+    gem 'sass-rails', ">= 5.0.0.beta1"
+    gem 'responders', "~> 2.0"
+  else
+    gem 'sass-rails'
+  end
 end