diff --git a/shadowsocks-go.sh b/shadowsocks-go.sh
index 5ae3d58..dbdb81f 100644
--- a/shadowsocks-go.sh
+++ b/shadowsocks-go.sh
@@ -125,6 +125,16 @@ get_ip(){
     [ ! -z ${IP} ] && echo ${IP} || echo
 }
 
+get_char(){
+    SAVEDSTTY=`stty -g`
+    stty -echo
+    stty cbreak
+    dd if=/dev/tty bs=1 count=1 2> /dev/null
+    stty -raw
+    stty echo
+    stty $SAVEDSTTY
+}
+
 # Pre-installation settings
 pre_install(){
     if ! check_sys packageManager yum && ! check_sys packageManager apt; then
@@ -162,15 +172,7 @@ pre_install(){
         echo "Input error, please input correct number"
     fi
     done
-    get_char(){
-        SAVEDSTTY=`stty -g`
-        stty -echo
-        stty cbreak
-        dd if=/dev/tty bs=1 count=1 2> /dev/null
-        stty -raw
-        stty echo
-        stty $SAVEDSTTY
-    }
+
     echo
     echo "Press any key to start...or Press Ctrl+C to cancel"
     char=`get_char`
@@ -189,18 +191,18 @@ pre_install(){
 download_files(){
     cd ${cur_dir}
     if is_64bit; then
-        if ! wget --no-check-certificate -c https://github.com/shadowsocks/shadowsocks-go/releases/download/1.1.5/shadowsocks-server-linux64-1.1.5.gz; then
-            echo "Failed to download shadowsocks-server-linux64-1.1.5.gz"
+        if ! wget --no-check-certificate -c https://github.com/shadowsocks/shadowsocks-go/releases/download/1.2.0/shadowsocks-server-linux64-1.2.0.tar.gz; then
+            echo "Failed to download shadowsocks-server-linux64-1.2.0.tar.gz"
             exit 1
         fi
-        gzip -d shadowsocks-server-linux64-1.1.5.gz
+        tar zxf shadowsocks-server-linux64-1.2.0.tar.gz
         if [ $? -eq 0 ]; then
-            echo "Decompress shadowsocks-server-linux64-1.1.5.gz success."
+            echo "Decompress shadowsocks-server-linux64-1.2.0.tar.gz success."
         else
-            echo "Decompress shadowsocks-server-linux64-1.1.5.gz failed! Please check gzip command."
+            echo "Decompress shadowsocks-server-linux64-1.2.0.tar.gz failed."
             exit 1
         fi
-        mv -f shadowsocks-server-linux64-1.1.5 /usr/bin/shadowsocks-server
+        mv -f shadowsocks-server /usr/bin/shadowsocks-server
     else
         if ! wget --no-check-certificate -c https://github.com/shadowsocks/shadowsocks-go/releases/download/1.1.5/shadowsocks-server-linux32-1.1.5.gz; then
             echo "Failed to download shadowsocks-server-linux32-1.1.5.gz"
@@ -210,7 +212,7 @@ download_files(){
         if [ $? -eq 0 ]; then
             echo "Decompress shadowsocks-server-linux32-1.1.5.gz success."
         else
-            echo "Decompress shadowsocks-server-linux32-1.1.5.gz failed! Please check gzip command."
+            echo "Decompress shadowsocks-server-linux32-1.1.5.gz failed."
             exit 1
         fi
         mv -f shadowsocks-server-linux32-1.1.5 /usr/bin/shadowsocks-server
@@ -289,7 +291,7 @@ firewall_set(){
 # Install Shadowsocks-go
 install(){
 
-    if [ -s /usr/bin/shadowsocks-server ]; then
+    if [ -f /usr/bin/shadowsocks-server ]; then
         echo "shadowsocks-go install success!"
         chmod +x /usr/bin/shadowsocks-server
         chmod +x /etc/init.d/shadowsocks