diff --git a/conf/ynh-hotspot b/conf/ynh-hotspot
index a13f7ac..9e4cb52 100644
--- a/conf/ynh-hotspot
+++ b/conf/ynh-hotspot
@@ -30,6 +30,12 @@ has_ip6delegatedprefix() {
   [[ -n "${ynh_ip6_net[${i}]}" ]] && [[ "${ynh_ip6_net[${i}]}" != "none" ]]
 }
 
+ip6addrfromdelegatedprefix() {
+  i=${1}
+
+  echo "${ynh_ip6_net[${i}]}${i}001"
+}
+
 is_nat_set() {
   internet_device=${1}
 
@@ -47,7 +53,7 @@ is_ip6addr_set() {
   i=${1}
   dev=$(devfromid "${i}")
 
-  ip address show dev "${dev}" 2> /dev/null | grep -q "${ynh_ip6_addr[${i}]}/64"
+  ip address show dev "${dev}" 2> /dev/null | grep -q "$(ip6addrfromdelegatedprefix $i)/64"
 }
 
 is_ip6firewall_set() {
@@ -114,8 +120,8 @@ set_ip6addr() {
   i=${1}
   dev=$(devfromid "${i}")
 
-  ip address delete "${ynh_ip6_addr[${i}]}/64" dev tun0 &> /dev/null
-  ip address add "${ynh_ip6_addr[${i}]}/64" dev "${dev}"
+  ip address delete "$(ip6addrfromdelegatedprefix $i)/64" dev tun0 &> /dev/null
+  ip address add "$(ip6addrfromdelegatedprefix $i)/64" dev "${dev}"
 }
 
 set_ip6firewall() {
@@ -213,7 +219,7 @@ unset_ip6addr() {
   i=${1}
   dev=$(devfromid "${i}")
 
-  ip address delete "${ynh_ip6_addr[${i}]}/64" dev "${dev}"
+  ip address delete "$(ip6addrfromdelegatedprefix $i)/64" dev "${dev}"
 }
 
 unset_ip6firewall() {
@@ -300,7 +306,6 @@ if [ "$1" != restart ]; then
   IFS='|' read -a ynh_wifi_ssid <<< "$(ynh_setting_get hotspot wifi_ssid)"
   IFS='|' read -a ynh_wifi_secure <<< "$(ynh_setting_get hotspot wifi_secure)"
   IFS='|' read -a ynh_wifi_passphrase <<< "$(ynh_setting_get hotspot wifi_passphrase)"
-  IFS='|' read -a ynh_ip6_addr <<< "$(ynh_setting_get hotspot ip6_addr)"
   IFS='|' read -a ynh_ip6_firewall <<< "$(ynh_setting_get hotspot ip6_firewall)"
   IFS='|' read -a ynh_ip6_net <<< "$(ynh_setting_get hotspot ip6_net)"
   IFS='|' read -a ynh_dns <<< "$(ynh_setting_get hotspot dns)"
@@ -534,7 +539,7 @@ case "$1" in
     for i in $(seq 0 $((${ynh_multissid} - 1))); do
       if has_ip6delegatedprefix ${i}; then
         echo "[INFO] hotspot${i}: IPv6 delegated prefix found"
-        echo "[INFO] hotspot${i}: IPv6 address computed from the delegated prefix: ${ynh_ip6_addr}"
+        echo "[INFO] hotspot${i}: IPv6 address computed from the delegated prefix: $(ip6addrfromdelegatedprefix $i)"
 
         if is_ip6addr_set ${i}; then
           echo "[OK] hotspot${i}: IPv6 address set"
diff --git a/scripts/install b/scripts/install
index 1e60651..ddf4403 100644
--- a/scripts/install
+++ b/scripts/install
@@ -119,15 +119,12 @@ ynh_script_progression --message="Configuring hotspot..."
 
 if [[ ! -v ip6_net ]]; then # if ip6_net not set
 	ip6_net=""
-	ip6_addr=""
 
 	if [[ -e /tmp/.ynh-vpnclient-started ]]; then
 		vpnclient_ip6_net=$(ynh_app_setting_get vpnclient ip6_net 2>&1)
-		vpnclient_ip6_addr=$(ynh_app_setting_get vpnclient ip6_addr 2>&1)
 
-		if [[ $vpnclient_ip6_net =~ :: && $vpnclient_ip6_addr =~ :: ]]; then
+		if [[ $vpnclient_ip6_net =~ :: ]]; then
 			ip6_net=${vpnclient_ip6_net}
-			ip6_addr=${vpnclient_ip6_addr}
 		fi
 	fi
 fi
@@ -142,7 +139,6 @@ ynh_app_setting_set --app=$app --key=wifi_secure --value=1
 ynh_app_setting_set --app=$app --key=wifi_passphrase --value="${wifi_passphrase}"
 ynh_app_setting_set --app=$app --key=wifi_device --value="${wifi_device}"
 ynh_app_setting_set --app=$app --key=wifi_channel --value=6
-ynh_app_setting_set --app=$app --key=ip6_addr --value="${ip6_addr}"
 ynh_app_setting_set --app=$app --key=ip6_firewall --value=1
 ynh_app_setting_set --app=$app --key=ip6_net --value="${ip6_net}"
 ynh_app_setting_set --app=$app --key=dns --value="2001:913::8,2001:910:800::12,80.67.188.188,80.67.169.12"
@@ -199,14 +195,6 @@ ynh_script_progression --message="Configuring a systemd service..."
 # Create a dedicated systemd config
 ynh_add_systemd_config --service=$service_name
 
-# Remove IPv6 address set if there is a VPN installed
-# ... but why ? ...
-if [[ $ip6_addr != "" ]]; then
-	if ip -6 address show dev tun0 2> /dev/null | grep -q "${ip6_addr}/"; then
-		ip address delete "${ip6_addr}/128" dev tun0 &> /dev/null
-	fi
-fi
-
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 6ee863e..86387d2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -80,13 +80,6 @@ then
 	ynh_app_setting_set --app=$app --key=ip6_net --value="$ip6_net"
 fi
 
-ip6_addr=$(ynh_app_setting_get --app=$app --key=ip6_addr)
-if [ "$ip6_addr" == "none" ]
-then
-    ip6_addr=""
-	ynh_app_setting_set --app=$app --key=ip6_addr --value="$ip6_addr"
-fi
-
 if [ -f /etc/nginx/conf.d/*.d/$app.conf ]; then
 	ynh_secure_remove /etc/nginx/conf.d/*.d/$app.conf
     ynh_systemd_action --service_name=nginx --action=reload