diff --git a/packages/vant-cli/src/compiler/compile-js.ts b/packages/vant-cli/src/compiler/compile-js.ts
index cc603bd57..d8bbf956e 100644
--- a/packages/vant-cli/src/compiler/compile-js.ts
+++ b/packages/vant-cli/src/compiler/compile-js.ts
@@ -3,7 +3,7 @@ import { readFileSync, removeSync, outputFileSync } from 'fs-extra';
 import { replaceExt } from '../common';
 import { replaceCssImport } from '../common/css';
 
-export function compileJs(filePath: string): Promise<undefined> {
+export function compileJs(filePath: string): Promise<void> {
   return new Promise((resolve, reject) => {
     let code = readFileSync(filePath, 'utf-8');
 
diff --git a/packages/vant-cli/src/compiler/compile-package.ts b/packages/vant-cli/src/compiler/compile-package.ts
index a37adc701..ef688ed8a 100644
--- a/packages/vant-cli/src/compiler/compile-package.ts
+++ b/packages/vant-cli/src/compiler/compile-package.ts
@@ -2,7 +2,7 @@ import webpack from 'webpack';
 import { getPackageConfig } from '../config/webpack.package';
 
 export async function compilePackage(isMinify: boolean) {
-  return new Promise((resolve, reject) => {
+  return new Promise<void>((resolve, reject) => {
     const config = getPackageConfig(isMinify);
 
     webpack(config, (err, stats) => {
diff --git a/packages/vant-cli/src/compiler/compile-site.ts b/packages/vant-cli/src/compiler/compile-site.ts
index 43e47ccf0..e1d24913f 100644
--- a/packages/vant-cli/src/compiler/compile-site.ts
+++ b/packages/vant-cli/src/compiler/compile-site.ts
@@ -54,7 +54,7 @@ function watch() {
 }
 
 function build() {
-  return new Promise((resolve, reject) => {
+  return new Promise<void>((resolve, reject) => {
     const config = getSitePrdConfig();
 
     webpack(config, (err, stats) => {
diff --git a/packages/vant-cli/src/compiler/gen-style-deps-map.ts b/packages/vant-cli/src/compiler/gen-style-deps-map.ts
index 102d130ad..9df4e135d 100644
--- a/packages/vant-cli/src/compiler/gen-style-deps-map.ts
+++ b/packages/vant-cli/src/compiler/gen-style-deps-map.ts
@@ -93,7 +93,7 @@ function getSequence(components: string[], depsMap: DepsMap) {
 export async function genStyleDepsMap() {
   const components = getComponents();
 
-  return new Promise(resolve => {
+  return new Promise<void>(resolve => {
     clearDepsCache();
 
     const map = {} as DepsMap;
diff --git a/yarn.lock b/yarn.lock
index fa9f9153e..5a6a2614a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11297,9 +11297,9 @@ typedarray-to-buffer@^3.1.5:
     is-typedarray "^1.0.0"
 
 typescript@^4.0.0:
-  version "4.0.2"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
-  integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
+  version "4.1.2"
+  resolved "https://registry.npm.taobao.org/typescript/download/typescript-4.1.2.tgz?cache=0&sync_timestamp=1605941213950&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Ftypescript%2Fdownload%2Ftypescript-4.1.2.tgz#6369ef22516fe5e10304aae5a5c4862db55380e9"
+  integrity sha1-Y2nvIlFv5eEDBKrlpcSGLbVTgOk=
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.6"