diff --git a/packages/frontend/src/scripts/misskey-api.ts b/packages/frontend/src/scripts/misskey-api.ts
index e71c5dd59..337fa1511 100644
--- a/packages/frontend/src/scripts/misskey-api.ts
+++ b/packages/frontend/src/scripts/misskey-api.ts
@@ -10,12 +10,17 @@ import { $i } from '@/account.js';
 export const pendingApiRequestsCount = ref(0);
 
 // Implements Misskey.api.ApiClient.request
-export function misskeyApi<E extends keyof Misskey.Endpoints, P extends Misskey.Endpoints[E]['req']>(
+export function misskeyApi<
+	ResT = void,
+	E extends keyof Misskey.Endpoints = keyof Misskey.Endpoints,
+	P extends Misskey.Endpoints[E]['req'] = Misskey.Endpoints[E]['req'],
+	_ResT = ResT extends void ? Misskey.api.SwitchCaseResponseType<E, P> : ResT,
+>(
 	endpoint: E,
 	data: P = {} as any,
 	token?: string | null | undefined,
 	signal?: AbortSignal,
-): Promise<Misskey.api.SwitchCaseResponseType<E, P>> {
+): Promise<_ResT> {
 	if (endpoint.includes('://')) throw new Error('invalid endpoint');
 	pendingApiRequestsCount.value++;
 
@@ -23,7 +28,7 @@ export function misskeyApi<E extends keyof Misskey.Endpoints, P extends Misskey.
 		pendingApiRequestsCount.value--;
 	};
 
-	const promise = new Promise<Misskey.Endpoints[E]['res'] | void>((resolve, reject) => {
+	const promise = new Promise<_ResT>((resolve, reject) => {
 		// Append a credential
 		if ($i) (data as any).i = $i.token;
 		if (token !== undefined) (data as any).i = token;
@@ -44,7 +49,7 @@ export function misskeyApi<E extends keyof Misskey.Endpoints, P extends Misskey.
 			if (res.status === 200) {
 				resolve(body);
 			} else if (res.status === 204) {
-				resolve();
+				resolve(undefined as _ResT); // void -> undefined
 			} else {
 				reject(body.error);
 			}
@@ -57,10 +62,15 @@ export function misskeyApi<E extends keyof Misskey.Endpoints, P extends Misskey.
 }
 
 // Implements Misskey.api.ApiClient.request
-export function misskeyApiGet<E extends keyof Misskey.Endpoints, P extends Misskey.Endpoints[E]['req']>(
+export function misskeyApiGet<
+	ResT = void,
+	E extends keyof Misskey.Endpoints = keyof Misskey.Endpoints,
+	P extends Misskey.Endpoints[E]['req'] = Misskey.Endpoints[E]['req'],
+	_ResT = ResT extends void ? Misskey.api.SwitchCaseResponseType<E, P> : ResT,
+>(
 	endpoint: E,
 	data: P = {} as any,
-): Promise<Misskey.api.SwitchCaseResponseType<E, P>> {
+): Promise<_ResT> {
 	pendingApiRequestsCount.value++;
 
 	const onFinally = () => {
@@ -69,7 +79,7 @@ export function misskeyApiGet<E extends keyof Misskey.Endpoints, P extends Missk
 
 	const query = new URLSearchParams(data as any);
 
-	const promise = new Promise<Misskey.Endpoints[E]['res'] | void>((resolve, reject) => {
+	const promise = new Promise<_ResT>((resolve, reject) => {
 		// Send request
 		window.fetch(`${apiUrl}/${endpoint}?${query}`, {
 			method: 'GET',
@@ -81,7 +91,7 @@ export function misskeyApiGet<E extends keyof Misskey.Endpoints, P extends Missk
 			if (res.status === 200) {
 				resolve(body);
 			} else if (res.status === 204) {
-				resolve();
+				resolve(undefined as _ResT); // void -> undefined
 			} else {
 				reject(body.error);
 			}