diff --git a/install.sh b/install.sh
index acccb6b..b327538 100644
--- a/install.sh
+++ b/install.sh
@@ -6,8 +6,8 @@ print_ylw(){
 
 print_ylw "[ ipv6 turn off ]"
 cat << EOF >> /etc/sysctl.conf
-net.ipv6.conf.all.disable_ipv6=0
-net.ipv6.conf.default.disable_ipv6=0
+net.ipv6.conf.all.disable_ipv6=1
+net.ipv6.conf.default.disable_ipv6=1
 net.ipv4.ip_forward=1
 EOF
 sysctl -p