diff --git a/server.py b/server.py
index bce130d..9f79070 100755
--- a/server.py
+++ b/server.py
@@ -104,7 +104,7 @@ def tt_hh(addr, data):
     ccid = data[7 + offs : 11 + offs]
     update_pairs(addr, ccid)
     # 组帧再返回
-    msg = data[:]
+    msg = bytearray(data[:])
     msg[12:-1] = val = "%04x" % int(time.time())
     # 计算校验和
     crc = 0