diff --git a/lemp.sh b/lemp.sh
index 5cc0660..93935a7 100755
--- a/lemp.sh
+++ b/lemp.sh
@@ -3,7 +3,7 @@
 # Install script for LEMP Web Server base on CentOS 7 by xiaosong
 
 SCRIPT_ROOT=`pwd`
-cd `${SCRIPT_ROOT}`
+cd $SCRIPT_ROOT
 
 while :; do echo
   read -p "Do you want to init your CentOS? [y/n]: " init_yn