Gemfile in dynflow-1.6.2 vs Gemfile in dynflow-1.6.3

@@ -33,10 +33,10 @@
   gem 'get_process_mem'
 end
 
 group :rails do
   gem 'daemons'
-  gem 'rails', '>= 4.2.9'
+  gem 'rails', '>= 4.2.9', '< 7'
   gem 'logging'
 end
 
 group :telemetry do
   gem 'statsd-instrument'