diff --git a/.travis.yml b/.travis.yml
index 57c2e3e3..45957147 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,4 +10,7 @@ before_install:
 script:
   - _mocha -R spec integration/regtest.js
   - _mocha -R spec --recursive
+cache:
+  directories:
+    - platform/ubuntu