diff --git a/packages/core/components/src/code-mirror/index.tsx b/packages/core/components/src/code-mirror/index.tsx
index 9b4a362b8..ad84c0a28 100644
--- a/packages/core/components/src/code-mirror/index.tsx
+++ b/packages/core/components/src/code-mirror/index.tsx
@@ -78,10 +78,10 @@ const completionSource = (context) => {
   return null;
 };
 
-export const CodeMirror = connect(({ value, onChange, ...otherProps }) => {
+export const CodeMirror = connect(({ value, onChange, defaultValue, ...otherProps }) => {
   return (
     <CM
-      value={value || ''}
+      value={value || defaultValue || ''}
       onChange={onChange}
       {...otherProps}
       extensions={[
diff --git a/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/WebhookManager.tsx b/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/WebhookManager.tsx
index 01a716fa5..1eb51d7e7 100644
--- a/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/WebhookManager.tsx
+++ b/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/WebhookManager.tsx
@@ -278,7 +278,6 @@ const schema: ISchema = {
                                                                   'ctx.request\nctx.body\nlib.JSON\nlib.Math\nlib.dayjs',
                                                               },
                                                               'x-collection-field': 'webhooks.code',
-                                                              'x-component-props': {},
                                                             },
                                                           },
                                                         },
@@ -629,7 +628,6 @@ const schema: ISchema = {
                                                                           'ctx.request\nctx.body\nlib.JSON\nlib.Math\nlib.dayjs',
                                                                       },
                                                                       'x-collection-field': 'webhooks.code',
-                                                                      'x-component-props': {},
                                                                     },
                                                                   },
                                                                 },
@@ -781,7 +779,9 @@ const schema: ISchema = {
                                                                     params: {
                                                                       type: 'string',
                                                                       'x-component': 'CodeMirror',
-                                                                      'x-component-props': {},
+                                                                      'x-component-props': {
+                                                                        defaultValue: '{}',
+                                                                      },
                                                                       'x-decorator': 'FormItem',
                                                                       'x-decorator-props': {
                                                                         label: 'query',
@@ -790,7 +790,9 @@ const schema: ISchema = {
                                                                     body: {
                                                                       type: 'string',
                                                                       'x-component': 'CodeMirror',
-                                                                      'x-component-props': {},
+                                                                      'x-component-props': {
+                                                                        defaultValue: '{}',
+                                                                      },
                                                                       'x-decorator': 'FormItem',
                                                                       'x-decorator-props': {
                                                                         label: 'body',
diff --git a/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/collections/dispatchers.tsx b/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/collections/dispatchers.tsx
index 43db7c89e..b192dbd80 100644
--- a/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/collections/dispatchers.tsx
+++ b/packages/plugins/@tachybase/plugin-workflow/src/client/features/webhook/collections/dispatchers.tsx
@@ -76,8 +76,10 @@ export const dispatchers: CollectionOptions = {
         title: tval('Code'),
         type: 'string',
         'x-component': 'CodeMirror',
-        default:
-          '// ctx.query can get user query\n// ctx.body to pass your data to workflow or to client who trigger this webhook.',
+        'x-component-props': {
+          defaultValue:
+            '// ctx.action.params can get user query\n// ctx.action.params.values can get user body\n// ctx.body to pass your data to workflow or to client who invoke this.',
+        },
       } as ISchema,
     },
   ],
diff --git a/packages/plugins/@tachybase/plugin-workflow/src/server/actions/workflows.ts b/packages/plugins/@tachybase/plugin-workflow/src/server/actions/workflows.ts
index 6ccb94b07..be11e5995 100644
--- a/packages/plugins/@tachybase/plugin-workflow/src/server/actions/workflows.ts
+++ b/packages/plugins/@tachybase/plugin-workflow/src/server/actions/workflows.ts
@@ -8,7 +8,7 @@ export async function update(context: Context, next) {
   const repository = utils.getRepositoryFromParams(context) as Repository;
   const { filterByTk, values } = context.action.params;
   context.action.mergeParams({
-    whitelist: ['title', 'description', 'enabled', 'triggerTitle', 'config', 'options', 'type'],
+    whitelist: ['title', 'description', 'enabled', 'triggerTitle', 'config', 'options', 'type', 'sync'],
   });
   // only enable/disable
   if (Object.keys(values).includes('config')) {
diff --git a/packages/plugins/@tachybase/plugin-workflow/src/server/features/webhook/webhooks.ts b/packages/plugins/@tachybase/plugin-workflow/src/server/features/webhook/webhooks.ts
index c5133c301..6478802ec 100644
--- a/packages/plugins/@tachybase/plugin-workflow/src/server/features/webhook/webhooks.ts
+++ b/packages/plugins/@tachybase/plugin-workflow/src/server/features/webhook/webhooks.ts
@@ -40,7 +40,7 @@ export class WebhookController {
       const wf = await wfRepo.findOne({ filter: { key: webhook.workflowKey, enabled: true } });
       const processor = await pluginWorkflow.trigger(wf, { data: webhookCtx.body }, { httpContext: ctx });
       if (!processor) {
-        return ctx.throw(500);
+        return ctx.throw('Workflow should be sync.', 500);
       }
       const { lastSavedJob } = processor;
       ctx.withoutDataWrapping = true;