diff --git a/packages/backend/src/core/PushNotificationService.ts b/packages/backend/src/core/PushNotificationService.ts
index e630539fb..3b706d985 100644
--- a/packages/backend/src/core/PushNotificationService.ts
+++ b/packages/backend/src/core/PushNotificationService.ts
@@ -115,12 +115,19 @@ export class PushNotificationService implements OnApplicationShutdown {
 						endpoint: subscription.endpoint,
 						auth: subscription.auth,
 						publickey: subscription.publickey,
+					}).then(() => {
+						this.refreshCache(userId);
 					});
 				}
 			});
 		}
 	}
 
+	@bindThis
+	public refreshCache(userId: string): void {
+		this.subscriptionsCache.refresh(userId);
+	}
+
 	@bindThis
 	public dispose(): void {
 		this.subscriptionsCache.dispose();
diff --git a/packages/backend/src/server/api/endpoints/sw/register.ts b/packages/backend/src/server/api/endpoints/sw/register.ts
index 06c04b3f9..a9a33149f 100644
--- a/packages/backend/src/server/api/endpoints/sw/register.ts
+++ b/packages/backend/src/server/api/endpoints/sw/register.ts
@@ -9,6 +9,7 @@ import type { SwSubscriptionsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { MetaService } from '@/core/MetaService.js';
 import { DI } from '@/di-symbols.js';
+import { PushNotificationService } from '@/core/PushNotificationService.js';
 
 export const meta = {
 	tags: ['account'],
@@ -66,6 +67,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 		private idService: IdService,
 		private metaService: MetaService,
+		private pushNotificationService: PushNotificationService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			// if already subscribed
@@ -97,6 +99,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				sendReadMessage: ps.sendReadMessage,
 			});
 
+			this.pushNotificationService.refreshCache(me.id);
+
 			return {
 				state: 'subscribed' as const,
 				key: instance.swPublicKey,
diff --git a/packages/backend/src/server/api/endpoints/sw/unregister.ts b/packages/backend/src/server/api/endpoints/sw/unregister.ts
index 2bc91c727..2edf7fab1 100644
--- a/packages/backend/src/server/api/endpoints/sw/unregister.ts
+++ b/packages/backend/src/server/api/endpoints/sw/unregister.ts
@@ -7,6 +7,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import type { SwSubscriptionsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { DI } from '@/di-symbols.js';
+import { PushNotificationService } from '@/core/PushNotificationService.js';
 
 export const meta = {
 	tags: ['account'],
@@ -29,12 +30,18 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	constructor(
 		@Inject(DI.swSubscriptionsRepository)
 		private swSubscriptionsRepository: SwSubscriptionsRepository,
+
+		private pushNotificationService: PushNotificationService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			await this.swSubscriptionsRepository.delete({
 				...(me ? { userId: me.id } : {}),
 				endpoint: ps.endpoint,
 			});
+
+			if (me) {
+				this.pushNotificationService.refreshCache(me.id);
+			}
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/sw/update-registration.ts b/packages/backend/src/server/api/endpoints/sw/update-registration.ts
index b56b07fd0..839a07c77 100644
--- a/packages/backend/src/server/api/endpoints/sw/update-registration.ts
+++ b/packages/backend/src/server/api/endpoints/sw/update-registration.ts
@@ -7,6 +7,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import type { SwSubscriptionsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { DI } from '@/di-symbols.js';
+import { PushNotificationService } from '@/core/PushNotificationService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -58,6 +59,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	constructor(
 		@Inject(DI.swSubscriptionsRepository)
 		private swSubscriptionsRepository: SwSubscriptionsRepository,
+
+		private pushNotificationService: PushNotificationService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const swSubscription = await this.swSubscriptionsRepository.findOneBy({
@@ -77,6 +80,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				sendReadMessage: swSubscription.sendReadMessage,
 			});
 
+			this.pushNotificationService.refreshCache(me.id);
+
 			return {
 				userId: swSubscription.userId,
 				endpoint: swSubscription.endpoint,