diff --git a/app/assets/javascripts/rails_admin/ra.history.js b/app/assets/javascripts/rails_admin/ra.history.js
index ba314a4..9d6deb6 100644
--- a/app/assets/javascripts/rails_admin/ra.history.js
+++ b/app/assets/javascripts/rails_admin/ra.history.js
@@ -1,6 +1,5 @@
 (function($) {
   $.widget("ra.history", {
-
     _create: function() {
       var widget = this;
       var dom_widget = widget.element;
@@ -90,6 +89,6 @@
   });
 })(jQuery);
 
-$(document).on('rails_admin.dom_ready', function() {
+$(document).ready(function() {
   $('#history').history();
 });
diff --git a/lib/rails_admin_history_rollback.rb b/lib/rails_admin_history_rollback.rb
index 9deb3a7..f29dd82 100644
--- a/lib/rails_admin_history_rollback.rb
+++ b/lib/rails_admin_history_rollback.rb
@@ -7,5 +7,7 @@ module RailsAdminHistoryRollback
 require 'rails_admin/extension'
 require 'rails_admin/extensions/paper_trail'
 
+require 'haml'
+
 require "rails_admin_history_rollback/extensions/paper_trail/auditing_adapter"
 require "rails_admin_history_rollback/config/actions/history_index"
diff --git a/rails_admin_history_rollback.gemspec b/rails_admin_history_rollback.gemspec
index 1317a49..dfd8dd0 100644
--- a/rails_admin_history_rollback.gemspec
+++ b/rails_admin_history_rollback.gemspec
@@ -19,4 +19,5 @@ Gem::Specification.new do |s|
   s.add_dependency "rails", ">= 4.2.0"
   s.add_dependency "rails_admin", ">= 0.6.6"
   s.add_dependency "paper_trail", ">= 3.0.6"
+  s.add_dependency "haml"
 end