diff --git a/start.sh b/start.sh
index 0530a8d..d7c0322 100755
--- a/start.sh
+++ b/start.sh
@@ -17,7 +17,7 @@ default_db = $DEFAULT_DB
 sendmail   = /usr/sbin/ssmtp
 
 [proxy]
-ip=${PROXY_IP:-172.17.0.1/16}
+ip=${PROXY_IP:-172.17.0.1/12}
 EOF
   export LSMB_CONFIG_FILE='/tmp/ledgersmb.conf'
 fi