diff --git a/mail/app/module.ver b/mail/app/module.ver
index 4d3682e5c30..8b4953e9619 100644
--- a/mail/app/module.ver
+++ b/mail/app/module.ver
@@ -1,8 +1,8 @@
 WIN32_MODULE_DESCRIPTION=Mozilla Thunderbird
 WIN32_MODULE_PRODUCTNAME=Thunderbird
 WIN32_MODULE_NAME=Thunderbird
-WIN32_MODULE_FILEVERSION=0,5,0,0
-WIN32_MODULE_FILEVERSION_STRING=0.5+
+WIN32_MODULE_FILEVERSION=0,6,0,0
+WIN32_MODULE_FILEVERSION_STRING=0.6+
 WIN32_MODULE_COPYRIGHT=ŠThunderbird and Mozilla Developers, according to the MPL 1.1/GPL 2.0/LGPL 2.1 licenses, as applicable.
 WIN32_MODULE_COMPANYNAME=Mozilla.org
 WIN32_MODULE_TRADEMARKS=Mozilla