diff --git a/dunlop-core.gemspec b/dunlop-core.gemspec
index 90facf0..24c0301 100644
--- a/dunlop-core.gemspec
+++ b/dunlop-core.gemspec
@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
   # assets
   s.add_dependency 'momentjs-rails'
   s.add_dependency 'pickadate-rails', '~> 3.5.5.0' # 3.5.6.0 does not work with editable: true
-  s.add_dependency 'coffee-rails', '~> 4.1'
+  s.add_dependency 'coffee-rails' #, '~> 4.1'
   s.add_dependency 'js-routes'
   s.add_dependency "sass-rails", ">= 5.0.4"
 
diff --git a/lib/dunlop.rb b/lib/dunlop.rb
index 5601c5d..f909e7a 100644
--- a/lib/dunlop.rb
+++ b/lib/dunlop.rb
@@ -1,5 +1,6 @@
 require "dunlop/engine"
 require "dunlop/csv_builder"
+require_relative '../app/services/json_column_coder'
 require 'core_extensions/activerecord/find_each_ordered'
 require 'core_extensions/date/epoch_week'
 require 'core_extensions/time/epoch_week'