diff --git a/packages/backend/src/models/json-schema/page.ts b/packages/backend/src/models/json-schema/page.ts
index 748d6f1245..8f6d5c675d 100644
--- a/packages/backend/src/models/json-schema/page.ts
+++ b/packages/backend/src/models/json-schema/page.ts
@@ -174,6 +174,7 @@ export const packedPageSchema = {
 		font: {
 			type: 'string',
 			optional: false, nullable: false,
+			enum: ['serif', 'sans-serif'],
 		},
 		script: {
 			type: 'string',
diff --git a/packages/frontend/src/pages/page-editor/page-editor.vue b/packages/frontend/src/pages/page-editor/page-editor.vue
index 3dd83b25c5..c446386a1c 100644
--- a/packages/frontend/src/pages/page-editor/page-editor.vue
+++ b/packages/frontend/src/pages/page-editor/page-editor.vue
@@ -60,9 +60,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { computed, provide, watch, ref } from 'vue';
 import * as Misskey from 'misskey-js';
-import { genId } from '@/utility/id.js';
 import { url } from '@@/js/config.js';
 import XBlocks from './page-editor.blocks.vue';
+import { genId } from '@/utility/id.js';
 import MkButton from '@/components/MkButton.vue';
 import MkSelect from '@/components/MkSelect.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
@@ -216,7 +216,37 @@ async function add() {
 	if (canceled || type == null) return;
 
 	const id = genId();
-	content.value.push({ id, type });
+	if (type === 'text') {
+		content.value.push({
+			id,
+			type,
+			text: '',
+		});
+		return;
+	} else if (type === 'section') {
+		content.value.push({
+			id,
+			type,
+			title: '',
+			children: [],
+		});
+		return;
+	} else if (type === 'image') {
+		content.value.push({
+			id,
+			type,
+			fileId: null,
+		});
+		return;
+	} else if (type === 'note') {
+		content.value.push({
+			id,
+			type,
+			detailed: false,
+			note: null,
+		});
+		return;
+	}
 }
 
 function setEyeCatchingImage(img: Event) {
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 4867854b20..f67ad76fc9 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -4900,7 +4900,8 @@ export type components = {
             summary: string | null;
             hideTitleWhenPinned: boolean;
             alignCenter: boolean;
-            font: string;
+            /** @enum {string} */
+            font: 'serif' | 'sans-serif';
             script: string;
             eyeCatchingImageId: string | null;
             eyeCatchingImage: components['schemas']['DriveFile'] | null;