diff --git a/plg_editors_xtd_comparisonchart/comparisonchart.xml b/plg_editors_xtd_comparisonchart/comparisonchart.xml
index 5d99cda..5de2415 100644
--- a/plg_editors_xtd_comparisonchart/comparisonchart.xml
+++ b/plg_editors_xtd_comparisonchart/comparisonchart.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<extension version="3.0" type="plugin" group="editors-xtd">
+<extension version="3.0" type="plugin" method="upgrade" group="editors-xtd">
 	<name>plg_editors-xtd_comparisonchart</name>
 	<creationDate>March 2014</creationDate>
 	<author>Joomplace Team</author>