diff -r 2034af722d02 -r 7ded87cc4b80 app/controllers/application_controller.rb
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -177,14 +177,14 @@
   def find_project
     @project = Project.find(params[:id])
   rescue ActiveRecord::RecordNotFound
-    render_404
+    User.current.logged? ? render_404 : require_login
   end
 
   # Find project of id params[:project_id]
   def find_project_by_project_id
     @project = Project.find(params[:project_id])
   rescue ActiveRecord::RecordNotFound
-    render_404
+    User.current.logged? ? render_404 : require_login
   end
 
   # Find a project based on params[:project_id]