diff --git a/mkdocs.yml b/mkdocs.yml
index 88d0c92..d720b04 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -6,6 +6,8 @@ markdown_extensions:
   - def_list
   - pymdownx.tasklist:
         custom_checkbox: true
-extra:
-  search:
-    language: 'jp'
+plugins:
+  - search:
+      lang:
+        - en
+        - jp