diff --git a/app/views/redmine_cas/_settings.html.erb b/app/views/redmine_cas/_settings.html.erb
index 1797052..3b5c259 100644
--- a/app/views/redmine_cas/_settings.html.erb
+++ b/app/views/redmine_cas/_settings.html.erb
@@ -1,19 +1,19 @@
 <p>
-	<%= label_tag "settings[enabled]", l(:redmine_cas_settings_enabled_label) %>
-	<%= check_box_tag "settings[enabled]", 1, @settings[:enabled] %>
+  <%= label_tag "settings[enabled]", l(:redmine_cas_settings_enabled_label) %>
+  <%= check_box_tag "settings[enabled]", 1, @settings[:enabled] %>
 </p>
 <p>
-	<%= label_tag "settings[cas_url]", l(:redmine_cas_settings_cas_url_label) %>
-	<%= text_field_tag "settings[cas_url]", @settings[:cas_url], :size => 50 %>
-	<em class="info"><%= l(:redmine_cas_settings_cas_url_helptext).html_safe %></em>
+  <%= label_tag "settings[cas_url]", l(:redmine_cas_settings_cas_url_label) %>
+  <%= text_field_tag "settings[cas_url]", @settings[:cas_url], :size => 50 %>
+  <em class="info"><%= l(:redmine_cas_settings_cas_url_helptext).html_safe %></em>
 </p>
 <p>
-	<%= label_tag "settings[attributes_mapping]", l(:redmine_cas_settings_attributes_mapping_label) %>
-	<%= text_field_tag "settings[attributes_mapping]", @settings[:attributes_mapping], :size => 50 %>
-	<em class="info"><%= l(:redmine_cas_settings_attributes_mapping_helptext, :attribute_names => User.attribute_names.join(', ')).html_safe %></em>
+  <%= label_tag "settings[attributes_mapping]", l(:redmine_cas_settings_attributes_mapping_label) %>
+  <%= text_field_tag "settings[attributes_mapping]", @settings[:attributes_mapping], :size => 50 %>
+  <em class="info"><%= l(:redmine_cas_settings_attributes_mapping_helptext, :attribute_names => User.attribute_names.join(', ')).html_safe %></em>
 </p>
 <p>
-	<%= label_tag "settings[autocreate_users]", l(:redmine_cas_settings_autocreate_users_label) %>
-	<%= check_box_tag "settings[autocreate_users]", 1, @settings[:autocreate_users] %>
+  <%= label_tag "settings[autocreate_users]", l(:redmine_cas_settings_autocreate_users_label) %>
+  <%= check_box_tag "settings[autocreate_users]", 1, @settings[:autocreate_users] %>
   <em class="info"><%= l(:redmine_cas_settings_autocreate_users_helptext).html_safe %></em>
 </p>