diff --git a/mozilla/calendar/windows/install.js b/mozilla/calendar/windows/install.js
index e8311a23db0..85f381f396c 100644
--- a/mozilla/calendar/windows/install.js
+++ b/mozilla/calendar/windows/install.js
@@ -1,4 +1,4 @@
-initInstall("Mozilla Calendar", "Mozilla/Calendar", "0.7");
+initInstall("Mozilla Calendar", "Mozilla/Calendar", "0.9");
 
 calendarDir = getFolder("Chrome","calendar");