diff --git a/Gemfile b/Gemfile
index 2334002..3dc13a4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gemspec
 
 gem 'ransack-mongoid', git: 'https://github.com/activerecord-hackery/ransack-mongoid'
 
-gem 'rails', '~> 5.2'
+gem 'rails', '>= 5.2', '< 6.1'
 
 gem 'devise'