diff --git a/.travis.yml b/.travis.yml
index a11bf70..9a01415 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: go
 sudo: true
 go:
-  - 1.9
-  - 1.10
+  - "1.9"
+  - "1.10"
   - tip
 
 install: