diff --git a/.travis.yml b/.travis.yml
index 535df49..e286a61 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,12 +13,13 @@ addons:
 
 env:
   global:
-    - R_LIBS_USER=~/R/library
+    - R_LIBS_USER=$HOME/R/library
 
 cache:
   directories:
     - $R_LIBS_USER
     - vendor/bundle
+    - $HOME/.ccache
 
 install:
   - bundle install --jobs=3 --retry=3