diff --git a/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java b/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
index 45f7b9f..eca0d3e 100644
--- a/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
+++ b/src/main/java/com/telpo/dipperposition/handler/NettyServerHandler.java
@@ -28,7 +28,7 @@ public class NettyServerHandler extends ChannelInboundHandlerAdapter {
     private static String AST_TIME_CMD = "TIME";
     private static String AST_POS_CMD = "POS";
     private static String AST_EPH_CMD = "EPH";
-    private static String AST_ALL_CMD = "ALL";
+    private static String AST_ALL_CMD = "all";
     private static String AST_TIME_CMD_BYTE = "54494d45";
     private static String AST_POS_CMD_BYTE = "504f53";
     private static String AST_EPH_CMD_BYTE = "455048";