diff --git a/Gemfile b/Gemfile
index c6d3376b..e2ff4a57 100644
--- a/Gemfile
+++ b/Gemfile
@@ -96,8 +96,9 @@ group :development do
   # Spring speeds up development by keeping your application running in the
   # background. Read more: https://github.com/rails/spring
   gem 'spring'
+	# Removed, because requires ruby > 2
   # gem 'better_errors'
-  gem 'binding_of_caller'
+  # gem 'binding_of_caller'
 
   gem 'sqlite3'
   gem 'guard-livereload'