diff --git a/types/index.d.ts b/types/index.d.ts
index 22efc9ebe..d83c9dde3 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -9,7 +9,11 @@ declare function dayjs (date?: dayjs.ConfigType, format?: dayjs.OptionType, stri
 declare function dayjs (date?: dayjs.ConfigType, format?: dayjs.OptionType, locale?: string, strict?: boolean): dayjs.Dayjs
 
 declare namespace dayjs {
-  export type ConfigType = string | number | Date | Dayjs
+  interface ConfigTypeMap {
+    default: string | number | Date | Dayjs
+  }
+
+  export type ConfigType = ConfigTypeMap[keyof ConfigTypeMap]
 
   export type OptionType = { locale?: string, format?: string, utc?: boolean } | string | string[]
 
diff --git a/types/plugin/arraySupport.d.ts b/types/plugin/arraySupport.d.ts
index 30ec75e5d..e4e44b2e6 100755
--- a/types/plugin/arraySupport.d.ts
+++ b/types/plugin/arraySupport.d.ts
@@ -1,4 +1,10 @@
 import { PluginFunc } from 'dayjs'
 
+declare module 'dayjs' {
+  interface ConfigTypeMap {
+    arraySupport: [number?, number?, number?, number?, number?, number?, number?]
+  }
+}
+
 declare const plugin: PluginFunc
 export = plugin