diff --git a/.travis.yml b/.travis.yml
index dbb4436..d650962 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: R
 cache:
-  packages: []
-  directores: [vendor/bundle]
+  packages: true
+  directores:
+  - vendor/bundle
 
 addons:
   apt: