diff --git a/package.json b/package.json
index 168017726..06c2293a7 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "misskey",
 	"author": "syuilo <syuilotan@yahoo.co.jp>",
-	"version": "12.80.2",
+	"version": "12.80.3",
 	"codename": "indigo",
 	"repository": {
 		"type": "git",
@@ -255,6 +255,7 @@
 		"xev": "2.0.1"
 	},
 	"devDependencies": {
+		"@redocly/openapi-core": "1.0.0-beta.44",
 		"@types/chai": "4.2.16",
 		"@types/fluent-ffmpeg": "2.1.17",
 		"chai": "4.3.4",
diff --git a/src/client/components/date-separated-list.vue b/src/client/components/date-separated-list.vue
index 9636ee053..34085cc07 100644
--- a/src/client/components/date-separated-list.vue
+++ b/src/client/components/date-separated-list.vue
@@ -92,7 +92,7 @@ export default defineComponent({
 					return [h(MkAd, {
 						class: 'a', // advertiseの意(ブロッカー対策)
 						key: item.id + ':ad',
-						prefer: 'horizontal',
+						prefer: ['horizontal', 'horizontal-big'],
 					}), el];
 				} else {
 					return el;
diff --git a/src/client/components/global/ad.vue b/src/client/components/global/ad.vue
index ee2a7ebe9..f88a1d202 100644
--- a/src/client/components/global/ad.vue
+++ b/src/client/components/global/ad.vue
@@ -30,7 +30,7 @@ export default defineComponent({
 
 	props: {
 		prefer: {
-			type: String,
+			type: Array,
 			required: true
 		},
 		specify: {
@@ -50,7 +50,7 @@ export default defineComponent({
 		if (props.specify) {
 			ad = props.specify;
 		} else {
-			let ads = instance.ads.filter(ad => ad.place === props.prefer);
+			let ads = instance.ads.filter(ad => props.prefer.includes(ad.place));
 
 			if (ads.length === 0) {
 				ads = instance.ads.filter(ad => ad.place === 'square');
@@ -130,6 +130,16 @@ export default defineComponent({
 			}
 		}
 
+		&.horizontal-big {
+			padding: 8px;
+
+			> a ,
+			> a > img {
+				max-width: min(600px, 100%);
+				max-height: 250px;
+			}
+		}
+
 		&.vertical {
 			> a ,
 			> a > img {
diff --git a/src/client/pages/gallery/post.vue b/src/client/pages/gallery/post.vue
index 50f81376e..dbac003e3 100644
--- a/src/client/pages/gallery/post.vue
+++ b/src/client/pages/gallery/post.vue
@@ -33,7 +33,7 @@
 					<MkFollowButton v-if="!$i || $i.id != post.user.id" :user="post.user" :inline="true" :transparent="false" :full="true" large class="koudoku"/>
 				</div>
 			</div>
-			<MkAd prefer="horizontal"/>
+			<MkAd :prefer="['horizontal', 'horizontal-big']"/>
 			<MkContainer :max-height="300" :foldable="true" class="other">
 				<template #header><i class="fas fa-clock"></i> {{ $ts.recentPosts }}</template>
 				<MkPagination :pagination="otherPostsPagination" #default="{items}">
diff --git a/src/client/pages/instance/ads.vue b/src/client/pages/instance/ads.vue
index ee7114f91..20747d6f9 100644
--- a/src/client/pages/instance/ads.vue
+++ b/src/client/pages/instance/ads.vue
@@ -13,6 +13,7 @@
 			<div style="margin: 32px 0;">
 				<MkRadio v-model="ad.place" value="square">square</MkRadio>
 				<MkRadio v-model="ad.place" value="horizontal">horizontal</MkRadio>
+				<MkRadio v-model="ad.place" value="horizontal-big">horizontal-big</MkRadio>
 			</div>
 			<div style="margin: 32px 0;">
 				{{ $ts.priority }}
diff --git a/src/client/pages/page.vue b/src/client/pages/page.vue
index 4e237c218..47a458df9 100644
--- a/src/client/pages/page.vue
+++ b/src/client/pages/page.vue
@@ -45,7 +45,7 @@
 				<div><i class="far fa-clock"></i> {{ $ts.createdAt }}: <MkTime :time="page.createdAt" mode="detail"/></div>
 				<div v-if="page.createdAt != page.updatedAt"><i class="far fa-clock"></i> {{ $ts.updatedAt }}: <MkTime :time="page.updatedAt" mode="detail"/></div>
 			</div>
-			<MkAd prefer="horizontal"/>
+			<MkAd :prefer="['horizontal', 'horizontal-big']"/>
 			<MkContainer :max-height="300" :foldable="true" class="other">
 				<template #header><i class="fas fa-clock"></i> {{ $ts.recentPosts }}</template>
 				<MkPagination :pagination="otherPostsPagination" #default="{items}">
diff --git a/src/client/ui/default.widgets.vue b/src/client/ui/default.widgets.vue
index c475e4272..cf5d1e07c 100644
--- a/src/client/ui/default.widgets.vue
+++ b/src/client/ui/default.widgets.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="ddiqwdnk">
 	<XWidgets class="widgets" :edit="editMode" :widgets="$store.reactiveState.widgets.value" @add-widget="addWidget" @remove-widget="removeWidget" @update-widget="updateWidget" @update-widgets="updateWidgets" @exit="editMode = false"/>
-	<MkAd class="ad" prefer="square"/>
+	<MkAd class="a" prefer="square"/>
 
 	<button v-if="editMode" @click="editMode = false" class="_textButton edit" style="font-size: 0.9em;"><i class="fas fa-check"></i> {{ $ts.editWidgetsExit }}</button>
 	<button v-else @click="editMode = true" class="_textButton edit" style="font-size: 0.9em;"><i class="fas fa-pencil-alt"></i> {{ $ts.editWidgets }}</button>
@@ -64,7 +64,7 @@ export default defineComponent({
 	padding-bottom: 8px;
 
 	> .widgets,
-	> .ad {
+	> .a {
 		width: 300px;
 	}
 
diff --git a/src/server/api/openapi/schemas.ts b/src/server/api/openapi/schemas.ts
index 78aae3b99..ee2773fe4 100644
--- a/src/server/api/openapi/schemas.ts
+++ b/src/server/api/openapi/schemas.ts
@@ -20,6 +20,7 @@ import { packedAntennaSchema } from '../../../models/repositories/antenna';
 import { packedClipSchema } from '../../../models/repositories/clip';
 import { packedFederationInstanceSchema } from '../../../models/repositories/federation-instance';
 import { packedQueueCountSchema } from '../../../models/repositories/queue';
+import { packedGalleryPostSchema } from '@/models/repositories/gallery-post';
 
 export function convertSchemaToOpenApiSchema(schema: Schema) {
 	const res: any = schema;
@@ -92,4 +93,5 @@ export const schemas = {
 	Antenna: convertSchemaToOpenApiSchema(packedAntennaSchema),
 	Clip: convertSchemaToOpenApiSchema(packedClipSchema),
 	FederationInstance: convertSchemaToOpenApiSchema(packedFederationInstanceSchema),
+	GalleryPost: convertSchemaToOpenApiSchema(packedGalleryPostSchema),
 };
diff --git a/test/fetch-resource.ts b/test/fetch-resource.ts
index 12a37b6cb..79a5519dd 100644
--- a/test/fetch-resource.ts
+++ b/test/fetch-resource.ts
@@ -12,7 +12,8 @@ process.env.NODE_ENV = 'test';
 
 import * as assert from 'assert';
 import * as childProcess from 'child_process';
-import { async, launchServer, signup, post, request, simpleGet } from './utils';
+import { async, launchServer, signup, post, request, simpleGet, port } from './utils';
+import * as openapi from '@redocly/openapi-core';
 
 // Request Accept
 const ONLY_AP = 'application/activity+json';
@@ -74,6 +75,20 @@ describe('Fetch resource', () => {
 			assert.strictEqual(res.type, JSON);
 		}));
 
+		it('Validate api.json', async(async () => {
+			const config = await openapi.loadConfig();
+			const result = await openapi.bundle({
+				config,
+				ref: `http://localhost:${port}/api.json`
+			});
+
+			for (const problem of result.problems) {
+				console.log(`${problem.message} - ${problem.location[0]?.pointer}`);
+			}
+
+			assert.strictEqual(result.problems.length, 0);
+		}));
+
 		it('GET favicon.ico', async(async () => {
 			const res = await simpleGet('/favicon.ico');
 			assert.strictEqual(res.status, 200);
diff --git a/test/utils.ts b/test/utils.ts
index b0393ee19..193017e26 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -6,7 +6,7 @@ import * as childProcess from 'child_process';
 import * as http from 'http';
 import loadConfig from '../src/config/load';
 
-const port = loadConfig().port;
+export const port = loadConfig().port;
 
 export const async = (fn: Function) => (done: Function) => {
 	fn().then(() => {
diff --git a/yarn.lock b/yarn.lock
index b6a52b951..92a8bb545 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -287,6 +287,31 @@
     "@nodelib/fs.scandir" "2.1.3"
     fastq "^1.6.0"
 
+"@redocly/ajv@^6.12.3":
+  version "6.12.4"
+  resolved "https://registry.yarnpkg.com/@redocly/ajv/-/ajv-6.12.4.tgz#b131c9c11d1bdaa5564f69bcaefe10a4c9a5aa65"
+  integrity sha512-RB6vWO78v6c+SW/3bZh+XZMr4nGdJKAiPGsBALuUZnLuCiQ7aXCT1AuFHqnfS2gyXbEUEj+kw8p4ux8KdAfs3A==
+  dependencies:
+    fast-deep-equal "^3.1.1"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.4.1"
+    uri-js "^4.2.2"
+
+"@redocly/openapi-core@1.0.0-beta.44":
+  version "1.0.0-beta.44"
+  resolved "https://registry.yarnpkg.com/@redocly/openapi-core/-/openapi-core-1.0.0-beta.44.tgz#e9a6c50ee2bb18e93b3439ed92c53e440de3aa7a"
+  integrity sha512-9HNnh1MzvMsLK1liuidFBqWiAsZ2Yg3RY58fcEsy0QruSMdDbn7SoeI1qnXe6O+BkBS+vAP4oVzZDMHCMKGsOQ==
+  dependencies:
+    "@redocly/ajv" "^6.12.3"
+    "@types/node" "^14.11.8"
+    colorette "^1.2.0"
+    js-levenshtein "^1.1.6"
+    js-yaml "^3.14.0"
+    lodash.isequal "^4.5.0"
+    minimatch "^3.0.4"
+    node-fetch "^2.6.1"
+    yaml-ast-parser "0.0.43"
+
 "@sentry/browser@5.29.2":
   version "5.29.2"
   resolved "https://registry.yarnpkg.com/@sentry/browser/-/browser-5.29.2.tgz#51adb4005511b1a4a70e4571880fc6653d651f91"
@@ -849,6 +874,11 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.41.tgz#d0b939d94c1d7bd53d04824af45f1139b8c45615"
   integrity sha512-dueRKfaJL4RTtSa7bWeTK1M+VH+Gns73oCgzvYfHZywRCoPSd8EkXBL0mZ9unPTveBn+D9phZBaxuzpwjWkW0g==
 
+"@types/node@^14.11.8":
+  version "14.14.44"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.44.tgz#df7503e6002847b834371c004b372529f3f85215"
+  integrity sha512-+gaugz6Oce6ZInfI/tK4Pq5wIIkJMEJUu92RB3Eu93mtj4wjjjz9EB5mLp5s1pSsLXdC/CPut/xF20ZzAQJbTA==
+
 "@types/nodemailer@6.4.1":
   version "6.4.1"
   resolved "https://registry.yarnpkg.com/@types/nodemailer/-/nodemailer-6.4.1.tgz#31f96f4410632f781d3613bd1f4293649e423f75"
@@ -2790,7 +2820,7 @@ color@^3.1.1, color@^3.1.3:
     color-convert "^1.9.1"
     color-string "^1.5.4"
 
-colorette@^1.2.1, colorette@^1.2.2:
+colorette@^1.2.0, colorette@^1.2.1, colorette@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
   integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
@@ -5757,6 +5787,11 @@ js-beautify@^1.6.12:
     mkdirp "~1.0.3"
     nopt "^4.0.3"
 
+js-levenshtein@^1.1.6:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/js-levenshtein/-/js-levenshtein-1.1.6.tgz#c6cee58eb3550372df8deb85fad5ce66ce01d59d"
+  integrity sha512-X2BB11YZtrRqY4EnQcLX5Rh373zbK4alC1FW7D7MBhL2gtcC17cTnr6DmfHZeS0s2rTHjUTMMHfG7gO8SSdw+g==
+
 js-sha3@0.8.0:
   version "0.8.0"
   resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.8.0.tgz#b9b7a5da73afad7dedd0f8c463954cbde6818840"
@@ -5794,6 +5829,14 @@ js-yaml@^3.13.1:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
+js-yaml@^3.14.0:
+  version "3.14.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.1.tgz#dae812fdb3825fa306609a8717383c50c36a0537"
+  integrity sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
 js-yaml@~3.7.0:
   version "3.7.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.7.0.tgz#5c967ddd837a9bfdca5f2de84253abe8a1c03b80"
@@ -6360,6 +6403,11 @@ lodash.foreach@^4.3.0:
   resolved "https://registry.yarnpkg.com/lodash.foreach/-/lodash.foreach-4.5.0.tgz#1a6a35eace401280c7f06dddec35165ab27e3e53"
   integrity sha1-Gmo16s5AEoDH8G3d7DUWWrJ+PlM=
 
+lodash.isequal@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
+  integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
+
 lodash.isfinite@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/lodash.isfinite/-/lodash.isfinite-3.3.2.tgz#fb89b65a9a80281833f0b7478b3a5104f898ebb3"
@@ -6966,7 +7014,7 @@ node-addon-api@^3.1.0:
   resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-3.1.0.tgz#98b21931557466c6729e51cb77cd39c965f42239"
   integrity sha512-flmrDNB06LIl5lywUz7YlNGZH/5p0M7W28k8hzd9Lshtdh1wshD2Y+U4h9LD6KObOy1f+fEVdgprPrEymjM5uw==
 
-node-fetch@2.6.1:
+node-fetch@2.6.1, node-fetch@^2.6.1:
   version "2.6.1"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
   integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
@@ -11381,6 +11429,11 @@ yallist@^4.0.0:
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-4.0.0.tgz#9bb92790d9c0effec63be73519e11a35019a3a72"
   integrity sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==
 
+yaml-ast-parser@0.0.43:
+  version "0.0.43"
+  resolved "https://registry.yarnpkg.com/yaml-ast-parser/-/yaml-ast-parser-0.0.43.tgz#e8a23e6fb4c38076ab92995c5dca33f3d3d7c9bb"
+  integrity sha512-2PTINUwsRqSd+s8XxKaJWQlUuEMHJQyEuh2edBbW8KNJz0SJPwUSD2zRWqezFEdN7IzAgeuYHFUCF7o8zRdZ0A==
+
 yaml@^1.10.0:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/yaml/-/yaml-1.10.0.tgz#3b593add944876077d4d683fee01081bd9fff31e"
@@ -11400,14 +11453,6 @@ yargs-parser@20.2.4, yargs-parser@^20.2.2:
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-20.2.4.tgz#b42890f14566796f85ae8e3a25290d205f154a54"
   integrity sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==
 
-yargs-parser@5.0.0-security.0, yargs-parser@^5.0.0:
-  version "5.0.0-security.0"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-5.0.0-security.0.tgz#4ff7271d25f90ac15643b86076a2ab499ec9ee24"
-  integrity sha512-T69y4Ps64LNesYxeYGYPvfoMTt/7y1XtfpIslUeK4um+9Hu7hlGoRtaDLvdXb7+/tfq4opVa2HRY5xGip022rQ==
-  dependencies:
-    camelcase "^3.0.0"
-    object.assign "^4.1.0"
-
 yargs-parser@>=5.0.0-security.0:
   version "20.2.7"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-20.2.7.tgz#61df85c113edfb5a7a4e36eb8aa60ef423cbc90a"
@@ -11421,6 +11466,14 @@ yargs-parser@^13.1.2:
     camelcase "^5.0.0"
     decamelize "^1.2.0"
 
+yargs-parser@^5.0.0:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-5.0.1.tgz#7ede329c1d8cdbbe209bd25cdb990e9b1ebbb394"
+  integrity sha512-wpav5XYiddjXxirPoCTUPbqM0PXvJ9hiBMvuJgInvo4/lAOTZzUprArw17q2O1P2+GHhbBr18/iQwjL5Z9BqfA==
+  dependencies:
+    camelcase "^3.0.0"
+    object.assign "^4.1.0"
+
 yargs-unparser@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/yargs-unparser/-/yargs-unparser-2.0.0.tgz#f131f9226911ae5d9ad38c432fe809366c2325eb"