diff --git a/.travis.yml b/.travis.yml
index c8866888..20fc41c4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: c++
 
 os:
-  -linux
-  -osx
+  - linux
+  - osx
 
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi