diff --git a/docs/mkdocs.yml b/docs/mkdocs.yml
index 5e81628..b6b6fac 100644
--- a/docs/mkdocs.yml
+++ b/docs/mkdocs.yml
@@ -68,13 +68,14 @@ plugins:
       fallback_to_default: true
       reconfigure_material: true
       reconfigure_search: true
+      default_language: zh
       languages:
-        - locale: en
+        en:
           default: true
           name: English
           build: true
           site_name: "Probing Documentation"
-        - locale: zh
+        zh:
           name: 中文
           build: true
           site_name: "Probing 文档"
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 6d4373e..e2aa14c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -8,3 +8,4 @@ mkdocs-static-i18n>=1.0.0
 mkdocstrings>=0.24.0
 mkdocstrings-python>=1.7.0
 jieba>=0.42.1
+mkdocs-i18n