diff --git a/start.sh b/start.sh
index 3fe2484a..9e878f80 100644
--- a/start.sh
+++ b/start.sh
@@ -31,6 +31,6 @@ if [ ! -z $HTTP_PORT] ; then
     sed -i 's/^httpport.*/httpport='$HTTP_PORT'/g' conf/app.conf
 fi
 
-sed -i 's/^runmode.*/runmode=prod'
+sed -i 's/^runmode.*/runmode=prod/g' conf/app.conf
 
 /go/src/github.com/lifei6671/godoc/godoc_linux_amd64
\ No newline at end of file