diff --git a/.travis.yml b/.travis.yml
index 84b5354..0a22cfa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,9 @@ php:
     - hhvm
     - nightly
 
+before_script:
+    - chmod 777 cache/dummy
+
 script:
     - phpunit