diff --git a/db/task_db.py b/db/task_db.py
index 7c1feca..af42045 100644
--- a/db/task_db.py
+++ b/db/task_db.py
@@ -178,9 +178,12 @@ class TaskDBOperator(BaseDBOperator):
             fields = []
             values = []
             for key, value in updates.items():
-                if key in ['groups', 'content_miniprogram', 'preview_recipients','content_link']:
+                if key in ['groups', 'content_miniprogram', 'preview_recipients']:
                     fields.append(f"{key} = %s")
                     values.append(value)
+                elif key == 'content_link' and isinstance(value, dict):
+                    fields.append(f"{key} = %s")
+                    values.append(json.dumps(value))
                 else:
                     fields.append(f"{key} = %s")
                     values.append(value)