diff --git a/README.md b/README.md
index d4838f7..c47715d 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ You can access Etherpad's admin panel at `domain.tld/admin`. The configuration f
 
 ## Documentation
 
- * Official documentation: http://etherpad.org/doc/v1.8.6
+ * Official documentation: http://etherpad.org/doc/v1.8.7
  * YunoHost documentation: https://yunohost.org/#/app_etherpad
 
 ## YunoHost specific features
diff --git a/README_fr.md b/README_fr.md
index 7f6b6f8..4780b48 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -32,7 +32,7 @@ Vous pouvez accéder au panneau d'administration d'Etherpad à l'adresse `domain
 
 ## Documentation
 
- * Documentation officielle : http://etherpad.org/doc/v1.8.6
+ * Documentation officielle : http://etherpad.org/doc/v1.8.7
  * Documentation YunoHost : https://yunohost.org/#/app_etherpad
 
 ## Fonctionnalités spécifiques à YunoHost
diff --git a/manifest.json b/manifest.json
index 779dc26..40b98e0 100644
--- a/manifest.json
+++ b/manifest.json
@@ -13,7 +13,7 @@
         "name": "eric_G"
     },
     "requirements": {
-        "yunohost": ">= 3.8.1"
+        "yunohost": ">= 4.0.0"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/install b/scripts/install
index 274e9fd..6189138 100644
--- a/scripts/install
+++ b/scripts/install
@@ -60,7 +60,7 @@ ynh_app_setting_set --app=$app --key=password --value=$password
 #=================================================
 # FIND AND OPEN A PORT
 #=================================================
-ynh_script_progression --message="Configuring firewall..." --weight=1
+ynh_script_progression --message="Finding an available port..." --weight=1
 
 # Find an available port
 port=$(ynh_find_port --port=9001)
@@ -189,14 +189,17 @@ ynh_systemd_action --service_name=$app --action=restart --log_path=systemd --lin
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=1
+ynh_script_progression --message="Configuring permissions..." --weight=1
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	ynh_permission_update --permission "main" --add "visitors"
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
+# Only the admin can access the admin panel of the app (if the app has an admin panel)
+ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
+
 #=================================================
 # RELOAD NGINX
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index aad4919..9c07e5c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -50,6 +50,18 @@ if [ -z "$final_path" ]; then
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
+if ! ynh_permission_exists --permission="admin"; then
+	# Create the required permissions
+	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -117,11 +129,11 @@ ynh_system_user_create --username=$app
 # #=================================================
 # ynh_script_progression --message="Installing Etherpad..." --weight=90
 
-chown -R $app: $final_path
+# chown -R $app: $final_path
 
-	pushd "$final_path"
-		ynh_exec_as $app env "$ynh_node_load_PATH" bin/installDeps.sh
-	popd
+# 	pushd "$final_path"
+# 		ynh_exec_as $app env "$ynh_node_load_PATH" bin/installDeps.sh
+# 	popd
 
 #=================================================
 # MODIFY A CONFIG FILE