diff --git a/plugins/redmine_private_wiki/README.md b/plugins/redmine_private_wiki/README.md
index 8e4dd2f..4e7a9ae 100755
--- a/plugins/redmine_private_wiki/README.md
+++ b/plugins/redmine_private_wiki/README.md
@@ -29,7 +29,7 @@ To set public/private wiki page :
 	$bundle exec rake redmine:plugins:migrate RAILS_ENV=production
 
 ## Compatibility :
-Tested for RedMine 3.3.* (Manually)
+Tested for RedMine 4.0.3 (Manually)
 
 ## License :
 This plugin is licensed under the MIT license.
diff --git a/plugins/redmine_private_wiki/app/views/private_wiki_management_views/_body_bottom.html.erb b/plugins/redmine_private_wiki/app/views/private_wiki_management_views/_body_bottom.html.erb
index 86a950a..70411ca 100755
--- a/plugins/redmine_private_wiki/app/views/private_wiki_management_views/_body_bottom.html.erb
+++ b/plugins/redmine_private_wiki/app/views/private_wiki_management_views/_body_bottom.html.erb
@@ -3,7 +3,7 @@
 	
 	<!--If the wiki is private, set PRIVATE flag-->
 	<% if @page.private? and User.current.allowed_to?(:view_privates_wiki, @project) %>
-		<span class="private_page_flag" title="<%= l(:private_title) %>"><%= l(:private_flag) %></span>
+		<span class="private_wiki_flag private_wiki_head"><%= l(:private_flag) %></span>
 	<% end %>
 
 	<!--If authorized, allow user to see changing privacy buttons-->
@@ -11,9 +11,9 @@
 	<%= link_to_if_authorized(l(:button_setpublic_wiki), {:action => 'change_privacy', :id => @page.title, :private => 0}, :method => :post, :class => 'icon icon-setpublic') if @page.private? %>
 
 	<script type="text/javascript">
-        $('.contextual:first').prepend($('.private_page_flag'));
+        $('.contextual:first').prepend($('.private_wiki_flag.private_wiki_head'));
         $('.contextual:first').append($('.icon-setprivate'));
         $('.contextual:first').append($('.icon-setpublic'));
     </script>
 
-<% end %>
\ No newline at end of file
+<% end %>
diff --git a/plugins/redmine_private_wiki/app/views/wiki/date_index.html.erb b/plugins/redmine_private_wiki/app/views/wiki/date_index.html.erb
index 8b9ff96..dc8e470 100755
--- a/plugins/redmine_private_wiki/app/views/wiki/date_index.html.erb
+++ b/plugins/redmine_private_wiki/app/views/wiki/date_index.html.erb
@@ -27,7 +27,7 @@
 				<% if !page.private? %>
 			    	<li><%= link_to page.pretty_title, :action => 'show', :id => page.title, :project_id => page.project %></li>
 			    <% elsif User.current.allowed_to?(:view_privates_wiki, @project) %>
-			    	<li><%= link_to page.pretty_title, :action => 'show', :id => page.title, :project_id => page.project %> <span class="private_wiki_flag" style="display:inline-block;" title="<%= l(:private_title) %>"><%= l(:private_flag) %></span></li>
+			    	<li><%= link_to page.pretty_title, :action => 'show', :id => page.title, :project_id => page.project %>&nbsp;&nbsp;&nbsp;&nbsp;<span class="private_wiki_flag" style="display:inline-block;"><%= l(:private_flag) %></span></li>
 			    <% end %>
 			<% end %>
 		</ul>
@@ -35,7 +35,7 @@
 		<h3><%= format_date(date) %></h3>
 		<ul>
 			<% @pages_by_date[date].each do |page| %>
-				<li><%= link_to page.pretty_title, :action => 'show', :id => page.title, :project_id => page.project %> <span class="private_wiki_flag" style="display:inline-block;" title="<%= l(:private_title) %>"><%= l(:private_flag) %></span></li>
+				<li><%= link_to page.pretty_title, :action => 'show', :id => page.title, :project_id => page.project %>&nbsp;&nbsp;&nbsp;&nbsp;<span class="private_wiki_flag" style="display:inline-block;"><%= l(:private_flag) %></span></li>
 			<% end %>
 		</ul>
 	<% end %>
diff --git a/plugins/redmine_private_wiki/assets/stylesheets/private_wiki.css b/plugins/redmine_private_wiki/assets/stylesheets/private_wiki.css
index 494438c..ce9d833 100755
--- a/plugins/redmine_private_wiki/assets/stylesheets/private_wiki.css
+++ b/plugins/redmine_private_wiki/assets/stylesheets/private_wiki.css
@@ -1,21 +1,14 @@
-.private_page_flag,
 .private_wiki_flag {
-    background: #d22;
+    background: #D22;
     color: white;
-    padding: 1px 2px;
+    padding: 2px 2px 2px 2px;
     border-radius: 2px;
-    cursor: default;
-}
-.private_wiki_flag {
-    margin-left: .44em;
-    background: rgb(255, 50, 0, 0.5);
-    line-height: 1em;
 }
 
 .icon-setprivate{
-    background-image: url(../images/hide.png);
+	background-image: url(../images/hide.png);
 }
 
 .icon-setpublic{
-    background-image: url(../images/reveal.png);
+	background-image: url(../images/reveal.png);
 }
diff --git a/plugins/redmine_private_wiki/config/locales/en.yml b/plugins/redmine_private_wiki/config/locales/en.yml
index a325637..f2e4454 100755
--- a/plugins/redmine_private_wiki/config/locales/en.yml
+++ b/plugins/redmine_private_wiki/config/locales/en.yml
@@ -2,5 +2,4 @@
 en:
   button_setprivate_wiki: Set Private
   button_setpublic_wiki: Set Public
-  private_flag: P!
-  private_title: Private page
+  private_flag: PRIVATE
diff --git a/plugins/redmine_private_wiki/config/locales/es.yml b/plugins/redmine_private_wiki/config/locales/es.yml
deleted file mode 100755
index cbe8f85..0000000
--- a/plugins/redmine_private_wiki/config/locales/es.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-# Spanish strings go here for Rails i18n
-es:
-  button_setprivate_wiki: Priv.
-  button_setpublic_wiki: Pub.
-  private_flag: P!
-  private_title: Página privada
diff --git a/plugins/redmine_private_wiki/config/locales/fr.yml b/plugins/redmine_private_wiki/config/locales/fr.yml
index 1d1149e..3212d88 100755
--- a/plugins/redmine_private_wiki/config/locales/fr.yml
+++ b/plugins/redmine_private_wiki/config/locales/fr.yml
@@ -2,5 +2,4 @@
 fr:
   button_setprivate_wiki: Rendre Privé
   button_setpublic_wiki: Rendre Public
-  private_flag: P!
-  private_title: Privé
+  private_flag: PRIVÉ
diff --git a/plugins/redmine_private_wiki/db/migrate/001_add_private_wiki_attribute.rb b/plugins/redmine_private_wiki/db/migrate/001_add_private_wiki_attribute.rb
index 5069e6f..8e86781 100755
--- a/plugins/redmine_private_wiki/db/migrate/001_add_private_wiki_attribute.rb
+++ b/plugins/redmine_private_wiki/db/migrate/001_add_private_wiki_attribute.rb
@@ -1,4 +1,4 @@
-class AddPrivateWikiAttribute < ActiveRecord::Migration
+class AddPrivateWikiAttribute < ActiveRecord::Migration[4.2]
 	def change
 		#Add a "Private" attribute used to identify visibility of wikis
 		add_column(:wiki_pages, "private", :boolean, :default => false)
diff --git a/plugins/redmine_private_wiki/lib/wiki_patches/application_helper_patch.rb b/plugins/redmine_private_wiki/lib/wiki_patches/application_helper_patch.rb
index e8166b4..bb12c63 100755
--- a/plugins/redmine_private_wiki/lib/wiki_patches/application_helper_patch.rb
+++ b/plugins/redmine_private_wiki/lib/wiki_patches/application_helper_patch.rb
@@ -3,36 +3,35 @@ module WikiPatches
     module ApplicationHelperPatch
         def self.included(base)
             base.class_eval do
-
               #Override application's method to not display hidden wikis or to display it with the PRIVATE flag
-            	def render_page_hierarchy_with_wiki_hidding(pages, node=nil, options={})
-                    content = ''
-                    if pages[node]
-                      content << "<ul class=\"pages-hierarchy\">\n"
-                      pages[node].each do |page|
-                        if !page.private? then
-                            content << "<li>"
-                            content << link_to(h(page.pretty_title), {:controller => 'wiki', :action => 'show', :project_id => page.project, :id => page.title, :version => nil},
-                                               :title => (options[:timestamp] && page.updated_on ? l(:label_updated_time, distance_of_time_in_words(Time.now, page.updated_on)) : nil))
-                            content << "\n" + render_page_hierarchy(pages, page.id, options) if pages[page.id]
-                            content << "</li>\n"
-                        elsif User.current.allowed_to?(:view_privates_wiki, @project) then
-                            content << "<li>"
-                            content << link_to(h(page.pretty_title), {:controller => 'wiki', :action => 'show', :project_id => page.project, :id => page.title, :version => nil},
-                                               :title => (options[:timestamp] && page.updated_on ? l(:label_updated_time, distance_of_time_in_words(Time.now, page.updated_on)) : nil))
-                            content << ' <span class="private_wiki_flag" style="display:inline-block;" title="' + l(:private_title) + '">' + l(:private_flag) + '</span>'
-                            content << "\n" + render_page_hierarchy(pages, page.id, options) if pages[page.id]
-                            content << "</li>\n"
-                        end
-                      end
-                      content << "</ul>\n"
-                    end
-                    content.html_safe
-                  end
-
-                alias_method_chain :render_page_hierarchy, :wiki_hidding
-
+		def render_page_hierarchy(pages, node=nil, options={})
+		    content = +''
+		    if pages[node]
+			    content << "<ul class=\"pages-hierarchy\">\n"
+			    pages[node].each do |page|
+				    if page.private and !User.current.allowed_to?(:view_privates_wiki, @project) then
+					    next
+				    end
+				    content << "<li>"
+				    if controller.controller_name == 'wiki' && controller.action_name == 'export'
+					    href = "##{page.title}"
+				    else
+					    href = {:controller => 'wiki', :action => 'show', :project_id => page.project, :id => page.title, :version => nil}
+				    end
+				    content << link_to(h(page.pretty_title), href,
+						       :title => (options[:timestamp] && page.updated_on ? l(:label_updated_time, distance_of_time_in_words(Time.now, page.updated_on)) : nil))
+				    if page.private then
+				            content << "&nbsp;&nbsp;&nbsp;&nbsp;<span class=\"private_wiki_flag\" style=\"display:inline-block;\">" + l(:private_flag) + "</span>"
+				    end
+				    content << "\n" + render_page_hierarchy(pages, page.id, options) if pages[page.id]
+				    content << "</li>\n"
+			    end
+			    content << "</ul>\n"
+		    end
+		    content.html_safe
+		end
             end
         end
     end
-end
\ No newline at end of file
+end
+
diff --git a/plugins/redmine_private_wiki/lib/wiki_patches/wiki_controller_patch.rb b/plugins/redmine_private_wiki/lib/wiki_patches/wiki_controller_patch.rb
index 45a3372..22b8575 100755
--- a/plugins/redmine_private_wiki/lib/wiki_patches/wiki_controller_patch.rb
+++ b/plugins/redmine_private_wiki/lib/wiki_patches/wiki_controller_patch.rb
@@ -5,7 +5,7 @@ module WikiPatches
      		base.class_eval do
                 unloadable
                 #Test :valide before :show action on wiki_controller
-        		before_filter :validate, :only => [:show,:edit,:rename, :protect, :history, :diff, :annotate, :add_attachment, :destroy]
+        		before_action :validate, :only => [:show,:edit,:rename, :protect, :history, :diff, :annotate, :add_attachment, :destroy]
         	end
         end
 
@@ -25,4 +25,4 @@ module WikiPatches
         	end
         end
     end
-end
\ No newline at end of file
+end