diff --git a/src/models/favorite.ts b/src/models/favorite.ts
index 1ec923c9eb..5f3c328eb1 100644
--- a/src/models/favorite.ts
+++ b/src/models/favorite.ts
@@ -5,6 +5,7 @@ import isObjectId from '../misc/is-objectid';
 import { pack as packNote } from './note';
 
 const Favorite = db.get<IFavorite>('favorites');
+Favorite.createIndex('userId');
 Favorite.createIndex(['userId', 'noteId'], { unique: true });
 export default Favorite;
 
diff --git a/src/models/follow-request.ts b/src/models/follow-request.ts
index 02b2a85b9f..50235b8a9d 100644
--- a/src/models/follow-request.ts
+++ b/src/models/follow-request.ts
@@ -5,6 +5,8 @@ import isObjectId from '../misc/is-objectid';
 import { pack as packUser } from './user';
 
 const FollowRequest = db.get<IFollowRequest>('followRequests');
+FollowRequest.createIndex('followerId');
+FollowRequest.createIndex('followeeId');
 FollowRequest.createIndex(['followerId', 'followeeId'], { unique: true });
 export default FollowRequest;
 
diff --git a/src/models/following.ts b/src/models/following.ts
index 58ede35a95..58d55bbeef 100644
--- a/src/models/following.ts
+++ b/src/models/following.ts
@@ -2,6 +2,8 @@ import * as mongo from 'mongodb';
 import db from '../db/mongodb';
 
 const Following = db.get<IFollowing>('following');
+Following.createIndex('followerId');
+Following.createIndex('followeeId');
 Following.createIndex(['followerId', 'followeeId'], { unique: true });
 export default Following;
 
diff --git a/src/models/note-unread.ts b/src/models/note-unread.ts
index 62408d23b6..dd08640d85 100644
--- a/src/models/note-unread.ts
+++ b/src/models/note-unread.ts
@@ -2,6 +2,8 @@ import * as mongo from 'mongodb';
 import db from '../db/mongodb';
 
 const NoteUnread = db.get<INoteUnread>('noteUnreads');
+NoteUnread.createIndex('userId');
+NoteUnread.createIndex('noteId');
 NoteUnread.createIndex(['userId', 'noteId'], { unique: true });
 export default NoteUnread;
 
diff --git a/src/models/note-watching.ts b/src/models/note-watching.ts
index b5ef3b61b7..83aaf8ad06 100644
--- a/src/models/note-watching.ts
+++ b/src/models/note-watching.ts
@@ -2,6 +2,8 @@ import * as mongo from 'mongodb';
 import db from '../db/mongodb';
 
 const NoteWatching = db.get<INoteWatching>('noteWatching');
+NoteWatching.createIndex('userId');
+NoteWatching.createIndex('noteId');
 NoteWatching.createIndex(['userId', 'noteId'], { unique: true });
 export default NoteWatching;