diff --git a/.travis.yml b/.travis.yml
index ff402c3..4c250b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: go
 
 go:
-  - 1.9
-  - 1.10
-  - 1.11
+  - "1.9"
+  - "1.10"
+  - "1.11"
 
 dist: trusty
 sudo: required