diff --git a/index.html b/index.html
index f94ec06..a2195ab 100644
--- a/index.html
+++ b/index.html
@@ -58,7 +58,7 @@
 
         <!-- actions -->
         <div class="border bg-gray-50 rounded shadow">
-            <div class="p-3 space-x-1">
+            <div class="p-3 space-x-1 space-y-1">
                 <button @click="getSelfInfo" class="border border-gray-500 px-2 bg-gray-100 hover:bg-gray-200 rounded">
                     AppStart
                 </button>
diff --git a/src/index.js b/src/index.js
index af95004..ff42c31 100644
--- a/src/index.js
+++ b/src/index.js
@@ -4,6 +4,7 @@ import SerialConnection from "./connection/serial_connection.js";
 import NodeJSSerialConnection from "./connection/nodejs_serial_connection.js";
 import WebSerialConnection from "./connection/web_serial_connection.js";
 import TCPConnection from "./connection/tcp_connection.js";
+import WebSocketConnection from "./connection/websocket_connection.js";
 import Constants from "./constants.js";
 import Advert from "./advert.js";
 import Packet from "./packet.js";
@@ -17,6 +18,7 @@ export {
     NodeJSSerialConnection,
     WebSerialConnection,
     TCPConnection,
+    WebSocketConnection,
     Constants,
     Advert,
     Packet,