diff --git a/src/main/java/moe/nekojimi/chords/Chords.java b/src/main/java/moe/nekojimi/chords/Chords.java
index 57427c2..54bb4bb 100644
--- a/src/main/java/moe/nekojimi/chords/Chords.java
+++ b/src/main/java/moe/nekojimi/chords/Chords.java
@@ -108,12 +108,17 @@ public final class Chords extends ListenerAdapter
 
         if (settings.getLocalAddr() != null)
         {
-            final WebSocketFactory webSocketFactory = new WebSocketFactory();
+            // make local binding socket factory
             final LocalBindSocketFactory localBindSocketFactory = new LocalBindSocketFactory();
+            localBindSocketFactory.setLocalAddress(InetAddress.getByName(settings.getLocalAddr()));
+
+            // install local socket factory for HTTP
             OkHttpClient.Builder httpBuilder = IOUtil.newHttpClientBuilder();
             httpBuilder.socketFactory(localBindSocketFactory);
+            builder.setHttpClientBuilder(httpBuilder);
 
-            localBindSocketFactory.setLocalAddress(InetAddress.getByName(settings.getLocalAddr()));
+            // install local socket factory for websockets
+            final WebSocketFactory webSocketFactory = new WebSocketFactory();
             webSocketFactory.setSocketFactory(localBindSocketFactory);
             builder.setWebsocketFactory(webSocketFactory);
         }