diff --git a/packages/backend/src/queue/processors/deliver.ts b/packages/backend/src/queue/processors/deliver.ts
index 910ee8613..2795b7d15 100644
--- a/packages/backend/src/queue/processors/deliver.ts
+++ b/packages/backend/src/queue/processors/deliver.ts
@@ -2,7 +2,6 @@ import { URL } from 'node:url';
 import Bull from 'bull';
 import { request } from '@/remote/activitypub/request.js';
 import { registerOrFetchInstanceDoc } from '@/services/register-or-fetch-instance-doc.js';
-import Logger from '@/services/logger.js';
 import { Instances } from '@/models/index.js';
 import { fetchInstanceMetadata } from '@/services/fetch-instance-metadata.js';
 import { toPuny } from '@/misc/convert-host.js';
@@ -11,8 +10,6 @@ import { getUserKeypair } from '@/misc/keypair-store.js';
 import { shouldSkipInstance } from '@/misc/skipped-instances.js';
 import { DeliverJobData } from '@/queue/types.js';
 
-const logger = new Logger('deliver');
-
 export default async (job: Bull.Job<DeliverJobData>) => {
 	const { host } = new URL(job.data.to);
 	const puny = toPuny(host);
diff --git a/packages/backend/src/services/note/side-effects.ts b/packages/backend/src/services/note/side-effects.ts
index e5e34807d..86f224d6b 100644
--- a/packages/backend/src/services/note/side-effects.ts
+++ b/packages/backend/src/services/note/side-effects.ts
@@ -193,13 +193,15 @@ export async function sideEffects(user: User, note: Note, silent = false, create
 	}
 
 	// Word mute
-	mutedWordsCache.fetch('').then(us => {
-		for (const u of us) {
-			checkWordMute(note, { id: u.userId }, u.mutedWords).then(shouldMute => {
+	mutedWordsCache.fetch('').then(users => {
+		if (users == null) return;
+
+		for (const user of users) {
+			checkWordMute(note, { id: user.userId }, user.mutedWords).then(shouldMute => {
 				if (shouldMute) {
 					MutedNotes.insert({
 						id: genId(),
-						userId: u.userId,
+						userId: user.userId,
 						noteId: note.id,
 						reason: 'word',
 					});
diff --git a/packages/backend/src/services/user-cache.ts b/packages/backend/src/services/user-cache.ts
index ed5599eae..1d6981400 100644
--- a/packages/backend/src/services/user-cache.ts
+++ b/packages/backend/src/services/user-cache.ts
@@ -1,5 +1,6 @@
 import { IsNull } from 'typeorm';
 import { ILocalUser, User } from '@/models/entities/user.js';
+import { UserPublickey } from '@/models/entities/user-publickey.js';
 import { Users, UserPublickeys } from '@/models/index.js';
 import { Cache } from '@/misc/cache.js';
 import { subscriber } from '@/db/redis.js';