diff --git a/.travis.yml b/.travis.yml
index 38825759..f3209dfa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,10 @@
 sudo: false
 language: php
 
+env:
+  global:
+    - secure: "foo"
+
 matrix:
   fast_finish: true
   include:
@@ -13,11 +17,16 @@ matrix:
   allow_failures:
     - php: 7
 
+cache:
+  directories:
+    - $HOME/.composer/cache
+
 before_install:
   - composer selfupdate
+  - composer config github-oauth.github.com $GITHUB_TOKEN
 
 install:
-  - travis_retry composer install --no-interaction --prefer-source
+  - travis_retry composer install --no-interaction --prefer-dist
 
 script:
   - vendor/bin/phpunit --coverage-text