diff --git a/src/webui/service/__init__.py b/src/webui/service/__init__.py
index d60cca6597ced52db8e320f3ba1beb2b032be65b..beb99a317816ef231aafb4a7f150ddeec3aeca0f 100644
--- a/src/webui/service/__init__.py
+++ b/src/webui/service/__init__.py
@@ -38,8 +38,14 @@ def readiness():
     except Exception as e:
         raise HealthError('Can\'t connect with the service: ' + e.details())
 
-def from_json(json_str):
-    return json.loads(json_str)
+def from_json(value):
+    try:
+        return json.loads(value)
+    except:
+        return value
+
+def is_dict(value):
+    return isinstance(value, dict)
 
 class SetSubAppMiddleware():
     def __init__(self, app, web_app_root):
@@ -80,10 +86,10 @@ def create_app(use_config=None, web_app_root=None):
 
     from webui.service.link.routes import link
     app.register_blueprint(link)
-    
 
     app.jinja_env.filters['from_json'] = from_json
-    
+    app.jinja_env.filters['is_dict'] = is_dict
+
     app.jinja_env.globals.update(get_working_context=get_working_context)
     app.jinja_env.globals.update(get_working_topology=get_working_topology)
 
diff --git a/src/webui/service/templates/device/detail.html b/src/webui/service/templates/device/detail.html
index 69ca93727310db7f89034f56510ceb5df504083f..2e8f79b87f28790985c6c3bea6f838cffc692434 100644
--- a/src/webui/service/templates/device/detail.html
+++ b/src/webui/service/templates/device/detail.html
@@ -94,11 +94,16 @@
                         {{ config.custom.resource_key }}
                     </td>
                     <td>
-                        <ul>
-                            {% for key, value in (config.custom.resource_value | from_json).items() %}
-                            <li><b>{{ key }}:</b> {{ value }}</li>
-                            {% endfor %}
-                        </ul>
+                        {% set json_resource_value = config.custom.resource_value | from_json %}
+                        {% if json_resource_value | is_dict %}
+                            <ul>
+                                {% for key, value in json_resource_value.items() %}
+                                <li><b>{{ key }}:</b> {{ value }}</li>
+                                {% endfor %}
+                            </ul>
+                        {% else %}
+                            {{ json_resource_value }}
+                        {% endif %}
                     </td>
                 </tr>
                 {% endif %}