diff --git a/ui-ngx/src/app/shared/components/directives/tb-json-to-string.directive.ts b/ui-ngx/src/app/shared/components/directives/tb-json-to-string.directive.ts
index ff8d2adead..dd2b79a044 100644
--- a/ui-ngx/src/app/shared/components/directives/tb-json-to-string.directive.ts
+++ b/ui-ngx/src/app/shared/components/directives/tb-json-to-string.directive.ts
@@ -26,6 +26,7 @@ import {
   Validator
 } from '@angular/forms';
 import { ErrorStateMatcher } from '@angular/material/core';
+import {isObject} from "@core/utils";
 
 @Directive({
   selector: '[tb-json-to-string]',
@@ -53,7 +54,11 @@ export class TbJsonToStringDirective implements ControlValueAccessor, Validator,
   @HostListener('input', ['$event.target.value']) input(newValue: any): void {
     try {
       this.data = JSON.parse(newValue);
-      this.parseError = false;
+      if (isObject(this.data)) {
+        this.parseError = false;
+      } else {
+        this.parseError = true;
+      }
     } catch (e) {
       this.parseError = true;
     }
diff --git a/ui-ngx/src/app/shared/models/constants.ts b/ui-ngx/src/app/shared/models/constants.ts
index 4bfce6414a..7eab516ef2 100644
--- a/ui-ngx/src/app/shared/models/constants.ts
+++ b/ui-ngx/src/app/shared/models/constants.ts
@@ -200,7 +200,7 @@ export const valueTypesMap = new Map<ValueType, ValueTypeData>(
       ValueType.JSON,
       {
         name: 'value.json',
-        icon: 'mdi:json'
+        icon: 'mdi:code-json'
       }
     ]
   ]