diff --git a/offlineimap.py b/offlineimap.py
index 566bd36..9b92b3c 100755
--- a/offlineimap.py
+++ b/offlineimap.py
@@ -20,4 +20,4 @@
 from offlineimap import OfflineImap
 
 offlineimap = OfflineImap()
-offlineimap.startup('6.2.0')
+offlineimap.startup('6.3.1')