diff --git a/.travis.yml b/.travis.yml
index 5792b69..1eceb67 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: go
 
 go:
-  - 1.9
-  - tip
+  - "1.9.x"
+  - "1.10.x"
+  - master
 
diff --git a/main.go b/main.go
index dc525f5..5c80aea 100644
--- a/main.go
+++ b/main.go
@@ -9,7 +9,7 @@ import (
 )
 
 // VERSION .
-const VERSION = "0.5.1"
+const VERSION = "0.5.2"
 
 func dialerFromConf() Dialer {
 	// global forwarders in xx.conf