diff --git a/frontend/appflowy_flutter/lib/plugins/document/presentation/editor_configuration.dart b/frontend/appflowy_flutter/lib/plugins/document/presentation/editor_configuration.dart
index c8222c5e03..39cd608d0e 100644
--- a/frontend/appflowy_flutter/lib/plugins/document/presentation/editor_configuration.dart
+++ b/frontend/appflowy_flutter/lib/plugins/document/presentation/editor_configuration.dart
@@ -92,8 +92,9 @@ Map<String, BlockComponentBuilder> getEditorBuilderMap({
             final factor = pageStyle.fontLayout.factor;
             final headingPaddings = pageStyle.lineHeightLayout.headingPaddings
                 .map((e) => e * factor);
-            final level = node.attributes[HeadingBlockKeys.level] ?? 6;
-            return EdgeInsets.only(top: headingPaddings.elementAt(level));
+            int level = node.attributes[HeadingBlockKeys.level] ?? 6;
+            level = level.clamp(1, 6);
+            return EdgeInsets.only(top: headingPaddings.elementAt(level - 1));
           }
 
           return const EdgeInsets.only(top: 12.0, bottom: 4.0);