diff --git a/proxy/src/main/java/net/md_5/bungee/YamlReconnectHandler.java b/proxy/src/main/java/net/md_5/bungee/YamlReconnectHandler.java
index 543c3a0b5..4a2451503 100644
--- a/proxy/src/main/java/net/md_5/bungee/YamlReconnectHandler.java
+++ b/proxy/src/main/java/net/md_5/bungee/YamlReconnectHandler.java
@@ -80,7 +80,7 @@ public class YamlReconnectHandler implements ReconnectHandler
     }
 
     @Override
-    public void save()
+    public synchronized void save()
     {
         try ( FileWriter wr = new FileWriter( file ) )
         {