diff --git a/src/main/java/cn/focot/codelab/minecodecraft/ConfigBean.java b/src/main/java/cn/focot/codelab/minecodecraft/ConfigBean.java
index d0da148..a00c12e 100644
--- a/src/main/java/cn/focot/codelab/minecodecraft/ConfigBean.java
+++ b/src/main/java/cn/focot/codelab/minecodecraft/ConfigBean.java
@@ -42,7 +42,7 @@ public class Tips {
     }
 
     public class Nats {
-        public String server;
+        public String server = "";
         public String prefix = "minecodecraft";
     }
 }
diff --git a/src/main/java/cn/focot/codelab/minecodecraft/event/EventMsg.java b/src/main/java/cn/focot/codelab/minecodecraft/event/EventMsg.java
index 877e275..f1e7235 100644
--- a/src/main/java/cn/focot/codelab/minecodecraft/event/EventMsg.java
+++ b/src/main/java/cn/focot/codelab/minecodecraft/event/EventMsg.java
@@ -20,7 +20,9 @@ public byte[] toBytes() {
     public void publish() {
         if (MineCodeCraftMod.hasNatsConnection()) {
             MineCodeCraftMod.getNatsConnection().publish(
-                    new StringJoiner(MineCodeCraftMod.getConfig().getConfigBean().nats.prefix, ".", this.msgSubject).toString(),
+                    new StringJoiner(".").
+                            add(MineCodeCraftMod.getConfig().getConfigBean().nats.prefix).
+                            add(this.msgSubject).toString(),
                     this.toBytes());
         }
     };