diff --git a/_includes/head_custom.html b/_includes/head_custom.html
index 3765604..030e2b5 100644
--- a/_includes/head_custom.html
+++ b/_includes/head_custom.html
@@ -2,6 +2,7 @@
 
 {% if site.search_enabled != false %}
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.min.js' | absolute_url }}"></script>
+    <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.multi.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.stemmer.support.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.ja.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/tinyseg.js' | absolute_url }}"></script>
diff --git a/assets/js/vendor/lunr.multi.min.js b/assets/js/vendor/lunr.multi.min.js
new file mode 100644
index 0000000..7debad0
--- /dev/null
+++ b/assets/js/vendor/lunr.multi.min.js
@@ -0,0 +1 @@
+!function(e,t){"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():t()(e.lunr)}(this,function(){return function(e){e.multiLanguage=function(){for(var t=Array.prototype.slice.call(arguments),i=t.join("-"),r="",n=[],s=[],p=0;p<t.length;++p)"en"==t[p]?(r+="\\w",n.unshift(e.stopWordFilter),n.push(e.stemmer),s.push(e.stemmer)):(r+=e[t[p]].wordCharacters,e[t[p]].stopWordFilter&&n.unshift(e[t[p]].stopWordFilter),e[t[p]].stemmer&&(n.push(e[t[p]].stemmer),s.push(e[t[p]].stemmer)));var o=e.trimmerSupport.generateTrimmer(r);return e.Pipeline.registerFunction(o,"lunr-multi-trimmer-"+i),n.unshift(o),function(){this.pipeline.reset(),this.pipeline.add.apply(this.pipeline,n),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add.apply(this.searchPipeline,s))}}}});
\ No newline at end of file
diff --git a/docs/jekyll/js-search-jekyll.md b/docs/jekyll/js-search-jekyll.md
index 844f580..9f13e27 100644
--- a/docs/jekyll/js-search-jekyll.md
+++ b/docs/jekyll/js-search-jekyll.md
@@ -21,25 +21,18 @@ tinyseg.js
 ```
 
 ## Step 2.
-`_includes/head_custom.html` に以下を記述する
-```
-{% if site.search_enabled != false %}
-   <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.min.js' | absolute_url }}"></script>
-   <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.multi.min.js' | absolute_url }}"></script>
-   <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.stemmer.support.min.js' | absolute_url }}"></script>
-   <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.ru.min.js' | absolute_url }}"></script>
-{% endif %}
-```
+`_includes/head_custom.html` に以下を記述する。
 ```
 {% raw %}{% if site.search_enabled != false %}
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.min.js' | absolute_url }}"></script>
+    <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.multi.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.stemmer.support.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.ja.min.js' | absolute_url }}"></script>
     <script type="text/javascript" src="{{ '/assets/js/vendor/tinyseg.js' | absolute_url }}"></script>
 {% endif %}{% endraw %}
 ```
 ## Step 3.
-`assets/js/just-the-docs.js` にある `var index = lunr(function(){` とある行のすぐ下に次のスクリプトを記述する。
+`assets/js/just-the-docs.js` にある `var index = lunr(function(){` のすぐ下の行に次のスクリプトを追記する。
 ``` 
 this.use(lunr.ja)
 ```