diff --git a/scripts/install b/scripts/install
index 54584de..4e27b4f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -178,13 +178,11 @@ ynh_script_progression --message="Generating fonts..."
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..."
+ynh_script_progression --message="Configuring permissions..."
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	# Everyone can access the app.
-	# The "main" permission is automatically created before the install script.
 	ynh_permission_update --permission="main" --add="visitors"
 fi
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 8a127ff..29ced64 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -51,6 +51,13 @@ 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
+
 ynh_secure_remove --file="/etc/apt/sources.list.d/onlyoffice.list"
 ynh_secure_remove --file="/etc/apt/sources.list.d/nodesource.list"