diff --git a/i18n/i18n.md b/i18n/i18n.md
index 05b328c..60d62e8 100644
--- a/i18n/i18n.md
+++ b/i18n/i18n.md
@@ -1,14 +1,14 @@
 Translations of 996.ICU's contents
 ===
 
-* [简体中文](zh_CN.md)
+* [简体中文](zh-Hans.md)
 * [English](en_US.md)
 * [हिन्दी](hin.md)
 * [Español](es_MX.md)
 * [Русский](ru_RU.md)
 * [Português](pt_PT.md)
 * [Français](fr_FR.md)
-* [繁體中文](zh_TW.md)
+* [繁體中文](zh-Hant.md)
 * [Deutsch](de_DE.md)
 * [Ελληνικά](gl-IT.md)
 * [Italiano](it_IT.md)
@@ -19,8 +19,8 @@ Translations of 996.ICU's contents
 * [Gaeilge na hÉireann](ga.md)
 * [Esperanto](epo.md)
 * [Irish](ga.md)
-* [文言-简体中文](lzh_Hans.md)
-* [文言-繁體中文](lzh_Hant.md)
+* [文言-简体中文](zh-lzh-Hans.md)
+* [文言-繁體中文](zh-lzh-Hant.md)
 * [tlhIngan Hol](tlh.md)
 * [0101](0101.md)
 * [Persian](fa_IR.md)
diff --git a/i18n/zh_CN.md b/i18n/zh-Hans.md
similarity index 100%
rename from i18n/zh_CN.md
rename to i18n/zh-Hans.md
diff --git a/i18n/zh_TW.md b/i18n/zh-Hant.md
similarity index 100%
rename from i18n/zh_TW.md
rename to i18n/zh-Hant.md
diff --git a/i18n/lzh_Hans.md b/i18n/zh-lzh-Hans.md
similarity index 100%
rename from i18n/lzh_Hans.md
rename to i18n/zh-lzh-Hans.md
diff --git a/i18n/lzh_Hant.md b/i18n/zh-lzh-Hant.md
similarity index 100%
rename from i18n/lzh_Hant.md
rename to i18n/zh-lzh-Hant.md