diff --git a/manifest.json b/manifest.json
index c22caff..26a2014 100644
--- a/manifest.json
+++ b/manifest.json
@@ -15,7 +15,7 @@
     "url": "http://julien.vaubourg.com"
   },
   "requirements": {
-    "yunohost": ">= 3.4"
+    "yunohost": ">= 3.2.0"
   },
   "multi_instance": false,
   "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index a3841d6..d1c83ef 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -7,39 +7,3 @@
 pkg_dependencies="php5-fpm sipcalc hostapd iptables iw dnsmasq"
 nonfree_packages="firmware-linux-free firmware-linux-nonfree firmware-atheros firmware-realtek firmware-ralink firmware-libertas atmel-firmware zd1211-firmware"
 free_packages="firmware-linux-free"
-
-#
-# Helper to start/stop/.. a systemd service from a yunohost context,
-# *and* the systemd service itself needs to be able to run yunohost
-# commands.
-#
-# Hence the need to release the lock during the operation
-#
-# usage : ynh_systemctl yolo restart
-#
-function ynh_systemctl()
-{
-  local ACTION="$1"
-  local SERVICE="$2"
-  local LOCKFILE="/var/run/moulinette_yunohost.lock"
-
-  # Launch the action
-  systemctl "$ACTION" "$SERVICE" &
-  local SYSCTLACTION=$!
-
-  # Save and release the lock...
-  cp $LOCKFILE $LOCKFILE.bkp.$$
-  ynh_secure_remove $LOCKFILE
-
-  # Wait for the end of the action
-  wait $SYSCTLACTION
-
-  # Make sure the lock is released...
-  while [ -f $LOCKFILE ]
-  do
-    sleep 0.1
-  done
-
-  # Restore the old lock
-  mv $LOCKFILE.bkp.$$ $LOCKFILE
-}
diff --git a/scripts/install b/scripts/install
index 4cb54d9..adeba1e 100644
--- a/scripts/install
+++ b/scripts/install
@@ -297,14 +297,14 @@ if [[ $ip6_addr != none ]]; then
 fi
 
 # register the service
-yunohost service add $service_name --description "Creates a Wi-Fi access point"
+yunohost service add $service_name --description "Creates a Wi-Fi access point" --need_lock
 
 # enable and start the service if device is present
 if [[ $wifi_device == none ]]; then
   echo "WARNING: Wifi Hotspot is not started because no wifi device was found (please, check the web admin)" >&2
 else
-  systemctl enable $service_name
-  systemctl start $service_name
+  yunohost service enable $service_name
+  yunohost service start $service_name
 fi
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 1e7ec6f..f184588 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -127,7 +127,12 @@ ynh_store_file_checksum "$final_path/config.php"
 ynh_print_info "Upgrading systemd configuration..."
 
 # Create a dedicated systemd config
-ynh_add_systemd_config
+ynh_add_systemd_config $service_name
+
+# Make sure that the yunohost service has a description and need-lock enabled
+yunohost service remove $service_name
+yunohost service add $service_name --description "Creates a Wi-Fi access point" --need_lock
+yunohost service start $service_name
 
 #=================================================
 # GENERIC FINALIZATION
@@ -155,4 +160,4 @@ systemctl reload nginx
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Upgrade of $app completed"
\ No newline at end of file
+ynh_print_info "Upgrade of $app completed"