diff --git a/contrib/systemd/offlineimap.service b/contrib/systemd/offlineimap.service
index 8b77bc4..56319bf 100644
--- a/contrib/systemd/offlineimap.service
+++ b/contrib/systemd/offlineimap.service
@@ -4,6 +4,8 @@ Description=Offlineimap Service
 [Service]
 Type=oneshot
 ExecStart=/usr/bin/offlineimap -o -u syslog
+# Give 12 seconds for offlineimap to gracefully stop before hard killing it.
+TimeoutStopSec=12
 
 [Install]
 WantedBy=mail.target