diff --git a/src/plugins/Title/Title.tsx b/src/plugins/Title/Title.tsx
index 795e1f1..8d990ba 100644
--- a/src/plugins/Title/Title.tsx
+++ b/src/plugins/Title/Title.tsx
@@ -11,7 +11,7 @@ import './Title.scss';
 export interface PluginTitleProps extends PluginWidgetProps {
     data: {
         text: string;
-        showInTOC: boolean;
+        showInTOC?: boolean;
     } & TitleFontDataProps &
         PluginWidgetProps['data'];
 }
diff --git a/src/plugins/Title/__stories__/Title.stories.tsx b/src/plugins/Title/__stories__/Title.stories.tsx
index 60081ca..e630df0 100644
--- a/src/plugins/Title/__stories__/Title.stories.tsx
+++ b/src/plugins/Title/__stories__/Title.stories.tsx
@@ -20,10 +20,7 @@ export const Size: Story = {
         <Flex direction="column" gap={2}>
             {sizes.map((size) => (
                 <Card key={size}>
-                    <PluginTitle
-                        data={{size, text: `Title size=${size}`, showInTOC: true}}
-                        {...args}
-                    />
+                    <PluginTitle data={{size, text: `Title size=${size}`}} {...args} />
                 </Card>
             ))}
             <Card>
@@ -32,7 +29,6 @@ export const Size: Story = {
                         fontSize: 40,
                         lineHeight: 100,
                         text: `Title fontSize=40, lineHeight=100`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -43,7 +39,6 @@ export const Size: Story = {
                         size: 'l',
                         fontSize: 40,
                         text: `Title size=l, fontSize=40`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -55,7 +50,6 @@ export const Size: Story = {
                         fontSize: 40,
                         lineHeight: 20,
                         text: `Title size=l, fontSize=40, lineHeight=20 🤷`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -67,7 +61,6 @@ export const Size: Story = {
                         fontSize: 40,
                         lineHeight: 70,
                         text: `Title size=l, fontSize=40, lineHeight=70`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -78,7 +71,6 @@ export const Size: Story = {
                         size: 'l',
                         lineHeight: 70,
                         text: `Title size=l, lineHeight=70`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -88,7 +80,6 @@ export const Size: Story = {
                     data={{
                         fontSize: 40,
                         text: `Title fontSize=40`,
-                        showInTOC: true,
                     }}
                     {...args}
                 />
@@ -107,7 +98,6 @@ export const Default: Story = {
         data: {
             size: 'm',
             text: `Title`,
-            showInTOC: true,
         },
     },
 };