diff --git a/app/controllers/dmsf_upload_controller.rb b/app/controllers/dmsf_upload_controller.rb
index d645aa0c..32732e23 100644
--- a/app/controllers/dmsf_upload_controller.rb
+++ b/app/controllers/dmsf_upload_controller.rb
@@ -47,6 +47,10 @@ class DmsfUploadController < ApplicationController
   # async single file upload handling 
   def upload_file
     @tempfile = params[:file]
+    unless @tempfile.original_filename
+      render_404
+      return
+    end
     @disk_filename = DmsfHelper.temp_filename(@tempfile.original_filename)
     File.open("#{DmsfHelper.temp_dir}/#{@disk_filename}", "wb") do |f| 
       while (buffer = @tempfile.read(8192))
diff --git a/init.rb b/init.rb
index 3d392d40..53583b6f 100644
--- a/init.rb
+++ b/init.rb
@@ -30,7 +30,7 @@ Redmine::Plugin.register :redmine_dmsf do
   author "Vít Jonáš"
   description "Document Management System Features"
   version "1.0.0 dev"
-  url "https://code.google.com/p/redmine-dmsf/"
+  url "http://code.google.com/p/redmine-dmsf/"
   author_url "mailto:vit.jonas@gmail.com"
   
   requires_redmine :version_or_higher => '1.1.0'