diff --git a/.travis.yml b/.travis.yml
index 1a38b32..35b959c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ sudo: require
 dist: trusty
 
 cache:
+  apt: true
   ccache: true
   directories:
     - /var/cache/apt/archives