diff --git a/runbot/static/src/js/fields/fields.js b/runbot/static/src/js/fields/fields.js
index b4361d35..3aaa1795 100644
--- a/runbot/static/src/js/fields/fields.js
+++ b/runbot/static/src/js/fields/fields.js
@@ -20,7 +20,7 @@ function stringify(obj) {
 export class JsonField extends TextField {
     static template = xml`
     <t t-if="props.readonly">
-            <span t-esc="value" />
+            <span t-esc="value"/>
         </t>
         <t t-else="">
             <div t-ref="div">
@@ -37,7 +37,6 @@ export class JsonField extends TextField {
         </t>
     `;
     setup() {
-        this.props.value.toString = () => stringify(this.props.value);
         if (this.props.dynamicPlaceholder) {
             this.dynamicPlaceholder = useDynamicPlaceholder();
         }
diff --git a/runbot/views/bundle_views.xml b/runbot/views/bundle_views.xml
index 04952c79..dd60ca96 100644
--- a/runbot/views/bundle_views.xml
+++ b/runbot/views/bundle_views.xml
@@ -106,7 +106,7 @@
                 <field name="trigger_id"/>
                 <field name="config_id"/>
                 <field name="extra_params"/>
-                <field name="config_data"/>
+                <field name="config_data" widget="jsonb"/>
             </tree>
         </field>
     </record>