diff --git a/.travis.yml b/.travis.yml
index fba962b950a578374c37104635dd048299887420..f8d9b4ccffbf43047d56cf514fadac92e6ac2b35 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,7 @@ cache:
   - pip
   - directories:
       - $HOME/.pre-commit
+      - $HOME/.vagrant.d/boxes
 
 install:
   - sudo apt-get update