diff --git a/CHANGELOG.md b/CHANGELOG.md
index cfd4640a3d..f75a666a42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -89,6 +89,7 @@ You should also include the user name that made the change.
 - Server: Judge instance block by endsWith @tamaina
 - Server: improve note scoring for featured notes @CyberRex0
 - Server: アンケート選択肢の文字数制限を緩和 @syuilo
+- Server: プロフィールの文字数制限を緩和 @syuilo
 - Server: add rate limits for some endpoints @syuilo
 - Server: improve stats api performance @syuilo
 - Server: improve nodeinfo performance @syuilo
diff --git a/packages/backend/src/models/entities/User.ts b/packages/backend/src/models/entities/User.ts
index 8bd5c9700d..1cfcc814ea 100644
--- a/packages/backend/src/models/entities/User.ts
+++ b/packages/backend/src/models/entities/User.ts
@@ -232,6 +232,6 @@ export type CacheableUser = CacheableLocalUser | CacheableRemoteUser;
 export const localUsernameSchema = { type: 'string', pattern: /^\w{1,20}$/.toString().slice(1, -1) } as const;
 export const passwordSchema = { type: 'string', minLength: 1 } as const;
 export const nameSchema = { type: 'string', minLength: 1, maxLength: 50 } as const;
-export const descriptionSchema = { type: 'string', minLength: 1, maxLength: 500 } as const;
+export const descriptionSchema = { type: 'string', minLength: 1, maxLength: 1500 } as const;
 export const locationSchema = { type: 'string', minLength: 1, maxLength: 50 } as const;
 export const birthdaySchema = { type: 'string', pattern: /^([0-9]{4})-([0-9]{2})-([0-9]{2})$/.toString().slice(1, -1) } as const;