diff --git a/lib/redmine_dmsf/webdav/base_resource.rb b/lib/redmine_dmsf/webdav/base_resource.rb
index 894c97dd..cd844ab0 100644
--- a/lib/redmine_dmsf/webdav/base_resource.rb
+++ b/lib/redmine_dmsf/webdav/base_resource.rb
@@ -132,40 +132,6 @@ module RedmineDmsf
         }
       end
 
-      # response:: parent Ox::Element
-      # stats:: Array of stats
-      # Build propstats response
-      def propstats(response, stats)
-        return if stats.empty?
-        stats.each do |status, props|
-          propstat = Ox::Element.new(D_PROPSTAT)
-          prop = Ox::Element.new(D_PROP)
-
-          props.each do |element, value|
-
-            name = element[:name]
-            if prefix = prefix_for(element[:ns_href])
-              ### TODO: A DMSF plugin workaround
-              if prefix =~ /^unknow/
-                next
-              end
-              ###
-              name = "#{prefix}:#{name}"
-            end
-
-            prop_element = Ox::Element.new(name)
-            ox_append prop_element, value, prefix: prefix
-            prop << prop_element
-
-          end
-
-          propstat << prop
-          propstat << ox_element(D_STATUS, "#{http_version} #{status.status_line}")
-
-          response << propstat
-        end
-      end
-
       def options(request, response)
         return NotFound if ((@path.length > 1) && ((!project) || (!project.module_enabled?('dmsf'))))
         if @__proxy.read_only
diff --git a/lib/redmine_dmsf/webdav/custom_middleware.rb b/lib/redmine_dmsf/webdav/custom_middleware.rb
index a225b213..3c110abd 100644
--- a/lib/redmine_dmsf/webdav/custom_middleware.rb
+++ b/lib/redmine_dmsf/webdav/custom_middleware.rb
@@ -33,7 +33,8 @@ module RedmineDmsf
               :root_uri_path => File.join(Redmine::Utils::relative_url_root, 'dmsf','webdav'),
               :resource_class => RedmineDmsf::Webdav::ResourceProxy,
               :log_to => Rails.logger,
-              :allow_unauthenticated_options_on_root => true
+              :allow_unauthenticated_options_on_root => true,
+              :namespaces => { 'http://apache.org/dav/props/' => 'd' }
             )
           end
         }.to_app