src/de/steamwar/bungeecore/Message.java

@@ -33,11 +33,12 @@ import java.io.InputStream;
 import java.text.DateFormat;
 import java.text.MessageFormat;
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class Message {
 
-    private static Map<String, SteamwarResourceBundle> bundles = new HashMap<>();
+    private static Map<String, SteamwarResourceBundle> bundles = new ConcurrentHashMap<>();
 
     public static TextComponent parseToComponent(String message, boolean prefixed, CommandSender sender, Object... params){
         return new TextComponent(TextComponent.fromLegacyText(parse(message, prefixed, locale(sender), params)));