diff --git a/.travis.yml b/.travis.yml
index bdb820c0f6..594894877e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ language: go
 
 go:
 - 1.8.x
+- 1.x
 
 go_import_path: github.com/prometheus/prometheus