diff --git a/lib/tasks/dmsf_clear_webdav_cache.rake b/lib/tasks/dmsf_clear_webdav_cache.rake
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+# encoding: utf-8
+#
+# Redmine plugin for Document Management System "Features"
+#
+# Copyright (C) 2011-17 Karel Picman <karel.picman@kontron.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+desc <<-END_DESC
+Clears the Webdav Cache
+
+Example:
+  rake redmine:dmsf_clear_webdav_cache RAILS_ENV="production"
+END_DESC
+  
+namespace :redmine do
+  task :dmsf_clear_webdav_cache => :environment do    
+    DmsfWebdavCache.clear
+  end
+end
+
+class DmsfWebdavCache
+  def self.clear
+    if Setting.plugin_redmine_dmsf['dmsf_memcached_servers'].nil? || Setting.plugin_redmine_dmsf['dmsf_memcached_servers'].empty?
+      puts 'No memcached server configured.'
+    else
+      puts "Clearing memcached at '#{Setting.plugin_redmine_dmsf['dmsf_memcached_servers']}'"
+      cache = ActiveSupport::Cache::MemCacheStore.new(Setting.plugin_redmine_dmsf['dmsf_memcached_servers'])
+      cache.clear
+    end
+  end
+end