diff --git a/config.py b/config.py
index 35280ce2..f537652a 100644
--- a/config.py
+++ b/config.py
@@ -3,6 +3,7 @@ import sys
 from os import getenv, makedirs, mkdir, pardir
 from os.path import expanduser, dirname, exists, isdir, join, normpath
 from sys import platform
+import semantic_version
 
 # Any of these may be imported by plugins
 appname = 'EDMarketConnector'
@@ -11,9 +12,9 @@ appcmdname = 'EDMC'
 # appversion **MUST** follow Semantic Versioning rules:
 # <https://semver.org/#semantic-versioning-specification-semver>
 # Major.Minor.Patch(-prerelease)(+buildmetadata)
-appversion = '4.0.2' #-rc1+a872b5f'
+appversion = '4.0.2'  #-rc1+a872b5f'
 # For some things we want appversion without (possible) +build metadata
-appversion_nobuild = appversion.split(sep='+')[0]
+appversion_nobuild = str(semantic_version.Version(appversion).truncate('prerelease'))
 copyright = u'© 2015-2019 Jonathan Harris, 2020 EDCD'
 
 update_feed = 'https://raw.githubusercontent.com/EDCD/EDMarketConnector/releases/edmarketconnector.xml'