diff --git a/conf/turnserver.conf b/conf/turnserver.conf
index bd9fbe9..c3149da 100644
--- a/conf/turnserver.conf
+++ b/conf/turnserver.conf
@@ -16,13 +16,13 @@ dh-file=/etc/ssl/private/dh2048.pem
 no-sslv2
 no-sslv3
 no-tlsv1
+no-tlsv1_1
 
 no-loopback-peers
 no-multicast-peers
 
+no-cli
+
 log-file=/var/log/matrix-__APP__/turnserver.log
 pidfile=/var/run/coturn-__APP__/turnserver.pid
 simple-log
-
-external-ip=__IPV4__,__IPV6__
-
diff --git a/scripts/install b/scripts/install
index eb98c2c..09edb6d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -363,16 +363,12 @@ public_ip6="$(curl ipv6.yunohost.org)" || true
 
 if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
 then
-    ynh_replace_string --match_string='__IPV4__' --replace_string="$public_ip4" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string='__IPV4__,' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip4" >> "$coturn_config_path"
 fi
 
 if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
 then
-    ynh_replace_string --match_string='__IPV6__' --replace_string="$public_ip6" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string=',__IPV6__' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip6" >> "$coturn_config_path"
 fi
 
 ynh_store_file_checksum --file="$coturn_config_path"
diff --git a/scripts/restore b/scripts/restore
index d3d3cfb..cf0cb62 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -185,16 +185,12 @@ public_ip6="$(curl ipv6.yunohost.org)" || true
 
 if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
 then
-    ynh_replace_string --match_string='__IPV4__' --replace_string="$public_ip4" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string='__IPV4__,' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip4" >> "$coturn_config_path"
 fi
 
 if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
 then
-    ynh_replace_string --match_string='__IPV6__' --replace_string="$public_ip6" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string=',__IPV6__' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip6" >> "$coturn_config_path"
 fi
 
 ynh_store_file_checksum --file="$coturn_config_path"
diff --git a/scripts/upgrade b/scripts/upgrade
index 8239b74..f441395 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -406,16 +406,12 @@ public_ip6="$(curl ipv6.yunohost.org)" || true
 
 if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
 then
-    ynh_replace_string --match_string='__IPV4__' --replace_string="$public_ip4" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string='__IPV4__,' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip4" >> "$coturn_config_path"
 fi
 
 if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
 then
-    ynh_replace_string --match_string='__IPV6__' --replace_string="$public_ip6" --target_file="$coturn_config_path"
-else
-    ynh_replace_string --match_string=',__IPV6__' --replace_string="" --target_file="$coturn_config_path"
+    echo "external-ip=$public_ip6" >> "$coturn_config_path"
 fi
 
 ynh_store_file_checksum --file="$coturn_config_path"
diff --git a/sources/Coturn_config_rotate.sh b/sources/Coturn_config_rotate.sh
index e1a99ac..7c2d704 100644
--- a/sources/Coturn_config_rotate.sh
+++ b/sources/Coturn_config_rotate.sh
@@ -9,18 +9,14 @@ external_IP_line="external-ip=__IPV4__,__IPV6__"
 public_ip4="$(curl ip.yunohost.org)" || true
 public_ip6="$(curl ipv6.yunohost.org)" || true
 
-if [[ -n "$public_ip4" ]] && ynh_validate_ip 4 "$public_ip4"
+if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
 then
-    external_IP_line="${external_IP_line/'__IPV4__'/$public_ip4}"
-else
-    external_IP_line="${external_IP_line/'__IPV4__,'/}"
+    echo "external-ip=$public_ip4" >> "$coturn_config_path"
 fi
 
-if [[ -n "$public_ip6" ]] && ynh_validate_ip 6 "$public_ip6"
+if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
 then
-    external_IP_line="${external_IP_line/'__IPV6__'/$public_ip6}"
-else
-    external_IP_line="${external_IP_line/',__IPV6__'/}"
+    echo "external-ip=$public_ip6" >> "$coturn_config_path"
 fi
 
 old_config_line=$(egrep "^external-ip=.*\$" "/etc/matrix-$app_instance/coturn.conf")