I meant 1.8.x instead of 1.8.0

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 1174a9f..14cef95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@
 language: go
 
 go:
-- 1.8
+- 1.8.x
 - 1.x
 
 before_install: