diff --git a/app/Http/Controllers/ServiceTemplateController.php b/app/Http/Controllers/ServiceTemplateController.php
index b13473620a..9edca5145a 100644
--- a/app/Http/Controllers/ServiceTemplateController.php
+++ b/app/Http/Controllers/ServiceTemplateController.php
@@ -58,9 +58,9 @@ class ServiceTemplateController extends Controller
             'name' => 'required|string|unique:service_templates',
             'device_group_id' => 'integer',
             'type' => 'string',
-            'param' => 'string',
-            'ip' => 'string',
-            'desc' => 'string',
+            'param' => 'nullable|string',
+            'ip' => 'nullable|string',
+            'desc' => 'nullable|string',
             'changed' => 'integer',
             'disabled' => 'integer',
             'ignore' => 'integer',