diff --git a/examples/watchdog.lua b/examples/watchdog.lua
index efee5e24..dabbd097 100644
--- a/examples/watchdog.lua
+++ b/examples/watchdog.lua
@@ -1,5 +1,4 @@
 local skynet = require "skynet"
-local netpack = require "netpack"
 
 local CMD = {}
 local SOCKET = {}