diff --git a/types/index.d.ts b/types/index.d.ts
index 4ce68350..3d318103 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -6,12 +6,12 @@ declare function dayjs (date?: dayjs.ConfigType): dayjs.Dayjs
 
 declare function dayjs (date?: dayjs.ConfigType, format?: dayjs.OptionType, strict?: boolean): dayjs.Dayjs
 
-declare function dayjs (date?: dayjs.ConfigType, format?: dayjs.OptionType, locale?: LocalePresetType, strict?: boolean): dayjs.Dayjs
+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
 
-  export type OptionType = { locale?: LocalePresetType, format?: string, utc?: boolean } | string | string[]
+  export type OptionType = { locale?: string, format?: string, utc?: boolean } | string | string[]
 
   type UnitTypeShort = 'd' | 'M' | 'y' | 'h' | 'm' | 's' | 'ms'
   export type UnitType = 'millisecond' | 'second' | 'minute' | 'hour' | 'day' | 'month' | 'year' | 'date' | UnitTypeShort;
@@ -96,16 +96,16 @@ declare namespace dayjs {
 
     isAfter(date: ConfigType, unit?: OpUnitType): boolean
 
-    locale(): LocalePresetType
+    locale(): string
 
-    locale(preset: LocalePresetType | ILocale, object?: Partial<ILocale>): Dayjs
+    locale(preset: string | ILocale, object?: Partial<ILocale>): Dayjs
   }
 
   export type PluginFunc<T = unknown> = (option: T, c: typeof Dayjs, d: typeof dayjs) => void
 
   export function extend<T = unknown>(plugin: PluginFunc<T>, option?: T): Dayjs
 
-  export function locale(preset?: LocalePresetType | ILocale, object?: Partial<ILocale>, isLocal?: boolean): string
+  export function locale(preset?: string | ILocale, object?: Partial<ILocale>, isLocal?: boolean): string
 
   export function isDayjs(d: any): d is Dayjs
 
diff --git a/types/locale/types.d.ts b/types/locale/types.d.ts
index 072c180d..2c24a645 100644
--- a/types/locale/types.d.ts
+++ b/types/locale/types.d.ts
@@ -31,140 +31,3 @@ declare interface ILocale {
     yy: string
   }>
 }
-
-declare type LocalePresetType =
-  | 'af'
-  | 'ar-dz'
-  | 'ar-kw'
-  | 'ar-ly'
-  | 'ar-ma'
-  | 'ar-sa'
-  | 'ar-tn'
-  | 'ar'
-  | 'az'
-  | 'be'
-  | 'bg'
-  | 'bi'
-  | 'bm'
-  | 'bn'
-  | 'bo'
-  | 'br'
-  | 'bs'
-  | 'ca'
-  | 'cs'
-  | 'cv'
-  | 'cy'
-  | 'da'
-  | 'de-at'
-  | 'de-ch'
-  | 'de'
-  | 'dv'
-  | 'el'
-  | 'en-SG'
-  | 'en-au'
-  | 'en-ca'
-  | 'en-gb'
-  | 'en-ie'
-  | 'en-il'
-  | 'en-in'
-  | 'en-nz'
-  | 'en-tt'
-  | 'en'
-  | 'eo'
-  | 'es-do'
-  | 'es-us'
-  | 'es'
-  | 'et'
-  | 'eu'
-  | 'fa'
-  | 'fi'
-  | 'fo'
-  | 'fr-ca'
-  | 'fr-ch'
-  | 'fr'
-  | 'fy'
-  | 'ga'
-  | 'gd'
-  | 'gl'
-  | 'gom-latn'
-  | 'gu'
-  | 'he'
-  | 'hi'
-  | 'hr'
-  | 'hu'
-  | 'hy-am'
-  | 'id'
-  | 'is'
-  | 'it-ch'
-  | 'it'
-  | 'ja'
-  | 'jv'
-  | 'ka'
-  | 'kk'
-  | 'km'
-  | 'kn'
-  | 'ko'
-  | 'ku'
-  | 'ky'
-  | 'lb'
-  | 'lo'
-  | 'lt'
-  | 'lv'
-  | 'me'
-  | 'mi'
-  | 'mk'
-  | 'ml'
-  | 'mn'
-  | 'mr'
-  | 'ms-my'
-  | 'ms'
-  | 'mt'
-  | 'my'
-  | 'nb'
-  | 'ne'
-  | 'nl-be'
-  | 'nl'
-  | 'nn'
-  | 'oc-lnc'
-  | 'pa-in'
-  | 'pl'
-  | 'pt-br'
-  | 'pt'
-  | 'ro'
-  | 'ru'
-  | 'rw'
-  | 'sd'
-  | 'se'
-  | 'si'
-  | 'sk'
-  | 'sl'
-  | 'sq'
-  | 'sr-cyrl'
-  | 'sr'
-  | 'ss'
-  | 'sv'
-  | 'sw'
-  | 'ta'
-  | 'te'
-  | 'tet'
-  | 'tg'
-  | 'th'
-  | 'tk'
-  | 'tl-ph'
-  | 'tlh'
-  | 'tr'
-  | 'tzl'
-  | 'tzm-latn'
-  | 'tzm'
-  | 'ug-cn'
-  | 'uk'
-  | 'ur'
-  | 'uz-latn'
-  | 'uz'
-  | 'vi'
-  | 'x-pseudo'
-  | 'yo'
-  | 'zh-cn'
-  | 'zh-hk'
-  | 'zh-tw'
-  | 'zh'