diff --git a/main.go b/main.go
index 53aece1..28f6143 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"flag"
 	"fmt"
 	"github.com/esrrhs/go-engine/src/geoip"
@@ -100,6 +101,23 @@ Usage:
 
 func main() {
 
+	defer func() {
+		if r := recover(); r != nil {
+			var err error
+			switch x := r.(type) {
+			case string:
+				err = errors.New(x)
+			case error:
+				err = x
+			default:
+				err = errors.New("Unknown panic")
+			}
+			if err != nil {
+				loggo.Error("crash %s", err)
+			}
+		}
+	}()
+
 	t := flag.String("type", "", "client or server")
 	listen := flag.String("l", "", "listen addr")
 	target := flag.String("t", "", "target addr")