diff --git a/src/reactivity/del.ts b/src/reactivity/del.ts
index d7a9607b..aceb324c 100644
--- a/src/reactivity/del.ts
+++ b/src/reactivity/del.ts
@@ -1,10 +1,11 @@
+import { AnyObject } from '../types/basic'
 import { getVueConstructor } from '../runtimeContext'
 import { hasOwn, isPrimitive, isUndef, isValidArrayIndex } from '../utils'
 
 /**
  * Delete a property and trigger change if necessary.
  */
-export function del(target: any, key: any) {
+export function del(target: AnyObject, key: any) {
   const Vue = getVueConstructor()
   const { warn } = Vue.util
 
diff --git a/src/reactivity/set.ts b/src/reactivity/set.ts
index 669487cf..d1baecf2 100644
--- a/src/reactivity/set.ts
+++ b/src/reactivity/set.ts
@@ -1,3 +1,4 @@
+import { AnyObject } from '../types/basic'
 import { getVueConstructor } from '../runtimeContext'
 import { isArray, isPrimitive, isUndef, isValidArrayIndex } from '../utils'
 import { defineAccessControl } from './reactive'
@@ -7,7 +8,7 @@ import { defineAccessControl } from './reactive'
  * notification and intercept it's subsequent access if the property doesn't
  * already exist.
  */
-export function set<T>(target: any, key: any, val: T): T {
+export function set<T>(target: AnyObject, key: any, val: T): T {
   const Vue = getVueConstructor()
   const { warn, defineReactive } = Vue.util
   if (__DEV__ && (isUndef(target) || isPrimitive(target))) {