diff --git a/mongodb/start.sh b/mongodb/start.sh
index fe46dc0..5d4a223 100644
--- a/mongodb/start.sh
+++ b/mongodb/start.sh
@@ -4,6 +4,6 @@
 echo 'call start.sh'
 
 cd $(dirname "${0}")
-mongod --dbpath ./db --port 27018 --bind_ip_all
+mongod --dbpath ./db --port 27017 --bind_ip_all
 
 echo '... done'