diff --git a/scripts/install b/scripts/install
index 91b97d4..25bd8c5 100644
--- a/scripts/install
+++ b/scripts/install
@@ -98,7 +98,7 @@ ynh_install_nodejs 8
 
 db_user=$app
 db_name=$app
-db_pass=ynh_string_random 20
+db_pass=$(ynh_string_random 20)
 ynh_app_setting_set $app db_pass $db_pass
 
 # Create postgresql database