diff --git a/build-number.txt b/build-number.txt
index 1beb84f7..6677dc1c 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-2562
\ No newline at end of file
+2570
\ No newline at end of file
diff --git a/src/main/java/me/chayapak1/chomens_bot/Bot.java b/src/main/java/me/chayapak1/chomens_bot/Bot.java
index 582dad98..8f39b10a 100644
--- a/src/main/java/me/chayapak1/chomens_bot/Bot.java
+++ b/src/main/java/me/chayapak1/chomens_bot/Bot.java
@@ -41,7 +41,7 @@ import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
 public class Bot extends SessionAdapter {
-    private final ArrayList<Listener> listeners = new ArrayList<>();
+    private final List<Listener> listeners = new ArrayList<>();
 
     public final String host;
     public final int port;
diff --git a/src/main/java/me/chayapak1/chomens_bot/plugins/VoiceChatPlugin.java b/src/main/java/me/chayapak1/chomens_bot/plugins/VoiceChatPlugin.java
index 9f5bdb73..9f7093f9 100644
--- a/src/main/java/me/chayapak1/chomens_bot/plugins/VoiceChatPlugin.java
+++ b/src/main/java/me/chayapak1/chomens_bot/plugins/VoiceChatPlugin.java
@@ -206,7 +206,7 @@ public class VoiceChatPlugin extends Bot.Listener implements Runnable {
 
     @Override
     public void disconnected (final DisconnectedEvent event) {
-        socket.close();
+        if (socket != null) socket.close();
         groups.clear();
 
         running = false;