diff --git a/lib/web/public/resources/narou.library.js b/lib/web/public/resources/narou.library.js
index 95c58aa1..cd5c4ff4 100644
--- a/lib/web/public/resources/narou.library.js
+++ b/lib/web/public/resources/narou.library.js
@@ -213,9 +213,17 @@ var Narou = (function() {
     },
 
     create_ws_uri: function() {
+      var uri = storage.get("ws_uri");
+      if (uri)
+        return uri;
+
       var host = location.hostname,
-          port = location.port;
-      return "ws://" + host + ":" + (parseInt(port) + 1) + "/";
+          port = location.port || 80,
+          protocol = (location.protocol === "https:") ? "wss": "ws";
+      uri = protocol + "://" + host + ":" + (parseInt(port) + 1) + "/";
+      storage.set("ws_uri", uri);
+      storage.save();
+      return uri;
     },
 
     onmessage: function(data) {
diff --git a/lib/web/public/resources/narou.ui.js b/lib/web/public/resources/narou.ui.js
index 6eca83ab..759e38a1 100644
--- a/lib/web/public/resources/narou.ui.js
+++ b/lib/web/public/resources/narou.ui.js
@@ -1224,6 +1224,24 @@ Mac スタイル：<br>メニューが画面外にはみ出そうとしたら、
     // ページ遷移するだけ
   });
 
+  /*
+   * メニュー
+   *   オプション＞WebSocket URIを設定する
+   */
+  $("#action-option-ws-uri").on(click_event_name, function(e) {
+    e.preventDefault();
+    slideNavbar.slide();
+    bootbox.prompt({
+      title: "WebSocket URI:",
+      value: storage.get("ws_uri"),
+      callback: function(result) {
+        if (result) {
+          storage.set("ws_uri", result);
+          storage.save();
+        }
+    }});
+  });
+
   /*
    * メニュー
    *   オプション＞ヘルプ
diff --git a/lib/web/views/index.haml b/lib/web/views/index.haml
index cdad3635..f7aebe88 100644
--- a/lib/web/views/index.haml
+++ b/lib/web/views/index.haml
@@ -158,6 +158,11 @@
                 %span
                   %span.glyphicon.glyphicon-wrench
                   環境設定...
+            %li#action-option-ws-uri
+              %a(href="#")
+                %span
+                  %span.glyphicon.glyphicon-wrench
+                  WebSocketのURIを設定する
             %li.divider
             %li#action-option-help
               %a(href="/help")