diff --git a/frontend/app_flowy/lib/startup/plugin/plugin.dart b/frontend/app_flowy/lib/startup/plugin/plugin.dart
index 6e06450295..168be76359 100644
--- a/frontend/app_flowy/lib/startup/plugin/plugin.dart
+++ b/frontend/app_flowy/lib/startup/plugin/plugin.dart
@@ -56,7 +56,7 @@ abstract class PluginBuilder {
 
   ViewDataTypePB get dataType => ViewDataTypePB.Text;
 
-  ViewLayoutTypePB? get subDataType => null;
+  ViewLayoutTypePB? get subDataType => ViewLayoutTypePB.Document;
 }
 
 abstract class PluginConfig {