diff --git a/packages/taro-cli/src/presets/commands/update.ts b/packages/taro-cli/src/presets/commands/update.ts
index 4a472f6d6383..53ebc870c004 100644
--- a/packages/taro-cli/src/presets/commands/update.ts
+++ b/packages/taro-cli/src/presets/commands/update.ts
@@ -93,7 +93,7 @@ export default (ctx: IPluginContext) => {
         const nervJSVersion = `^${await getLatestVersion('nervjs')}`
 
         // 更新 @tarojs/* 版本和 NervJS 版本
-        Object.keys(packageMap.dependencies).forEach((key) => {
+        Object.keys(packageMap.dependencies || {}).forEach((key) => {
           if (UPDATE_PACKAGE_LIST.indexOf(key) !== -1) {
             if (key.includes('nerv')) {
               packageMap.dependencies[key] = nervJSVersion
@@ -102,7 +102,7 @@ export default (ctx: IPluginContext) => {
             }
           }
         })
-        Object.keys(packageMap.devDependencies).forEach((key) => {
+        Object.keys(packageMap.devDependencies || {}).forEach((key) => {
           if (UPDATE_PACKAGE_LIST.indexOf(key) !== -1) {
             if (key.includes('nerv')) {
               packageMap.devDependencies[key] = nervJSVersion
diff --git a/packages/taro/types/taro.extend.d.ts b/packages/taro/types/taro.extend.d.ts
index ba802d3bc57d..fe22bd7cb696 100644
--- a/packages/taro/types/taro.extend.d.ts
+++ b/packages/taro/types/taro.extend.d.ts
@@ -106,7 +106,7 @@ declare namespace Taro {
 
   function setIsUsingDiff (flag: boolean)
 
-  const Current: {
+  interface Current {
     app: AppInstance | null,
     router: RouterInfo | null,
     page: PageInstance | null,
@@ -114,4 +114,8 @@ declare namespace Taro {
     onHide: string,
     onShow: string
   }
+
+  const Current: Current
+
+  function getCurrentInstance(): Current
 }