diff --git a/lib/helpers/main_helper.rb b/lib/helpers/main_helper.rb
index ecc39a3..4dd4110 100644
--- a/lib/helpers/main_helper.rb
+++ b/lib/helpers/main_helper.rb
@@ -18,11 +18,11 @@ def javascripts( scripts )
     end
           
     def v_styles(stylesheet)
-      "/stylesheets/#{stylesheet}.css?" + File.mtime(File.join(Sinatra::Application.public, "stylesheets", "#{stylesheet}.css")).to_i.to_s
+      "/stylesheets/#{stylesheet}.css?" + File.mtime(File.join(Sinatra::Application.public_folder, "stylesheets", "#{stylesheet}.css")).to_i.to_s
     end
     
     def v_js(js)
-      "/javascripts/#{js}.js?" + File.mtime(File.join(Sinatra::Application.public, "javascripts", "#{js}.js")).to_i.to_s
+      "/javascripts/#{js}.js?" + File.mtime(File.join(Sinatra::Application.public_folder, "javascripts", "#{js}.js")).to_i.to_s
     end
       
     def zone_locator
@@ -92,4 +92,4 @@ def escape_javascript(javascript)
       end
     end    
   end  
-end
\ No newline at end of file
+end