diff --git a/README.md b/README.md
index cd83be7af..a57f5a4e7 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@
 
 ## 細かい変更点
 
+- 最大 15 件の投稿を固定できるように
+	- 5 件は少ないと思ったため
 - 投稿ボタンを巨大にできるように
   - https://mstdn.poyo.me/@prime/110668364208741253 を真似しました
 - アンテナにフォロー中のユーザーのホーム投稿も表示する
diff --git a/packages/backend/src/remote/activitypub/models/person.ts b/packages/backend/src/remote/activitypub/models/person.ts
index 8f17cfae8..6987798ff 100644
--- a/packages/backend/src/remote/activitypub/models/person.ts
+++ b/packages/backend/src/remote/activitypub/models/person.ts
@@ -671,7 +671,7 @@ export async function updateFeatured(userId: User["id"], resolver?: Resolver) {
 	const featuredNotes = await Promise.all(
 		items
 			.filter((item) => getApType(item) === "Note") // TODO: Maybe it doesn't have to be a Note.
-			.slice(0, 5)
+			.slice(0, 15)
 			.map((item) => limit(() => resolveNote(item, resolver))),
 	);
 
diff --git a/packages/backend/src/services/i/pin.ts b/packages/backend/src/services/i/pin.ts
index 97045a9fa..64b9b159f 100644
--- a/packages/backend/src/services/i/pin.ts
+++ b/packages/backend/src/services/i/pin.ts
@@ -35,7 +35,7 @@ export async function addPinned(
 
 	const pinings = await UserNotePinings.findBy({ userId: user.id });
 
-	if (pinings.length >= 5) {
+	if (pinings.length >= 15) {
 		throw new IdentifiableError(
 			"15a018eb-58e5-4da1-93be-330fcc5e4e1a",
 			"You can not pin notes any more.",