diff --git a/shadowsocks-nodejs.sh b/shadowsocks-nodejs.sh
index c889f91..1cd5a1a 100644
--- a/shadowsocks-nodejs.sh
+++ b/shadowsocks-nodejs.sh
@@ -103,8 +103,7 @@ function download_files(){
 
 # Config shadowsocks
 function config_shadowsocks(){
-    touch /etc/shadowsocks.json
-    cat >>/etc/shadowsocks.json<<-EOF
+    cat > /etc/shadowsocks.json<<-EOF
 {
     "server":"${IP}",
     "server_port":8989,
diff --git a/shadowsocks.sh b/shadowsocks.sh
index 4ed03bf..71415ba 100644
--- a/shadowsocks.sh
+++ b/shadowsocks.sh
@@ -98,8 +98,7 @@ function download_files(){
 
 # Config shadowsocks
 function config_shadowsocks(){
-    touch /etc/shadowsocks.json
-    cat >>/etc/shadowsocks.json<<-EOF
+    cat > /etc/shadowsocks.json<<-EOF
 {
     "server":"${IP}",
     "server_port":8989,