diff --git a/.travis.yml b/.travis.yml
index 99de817..05d997c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,9 @@ sudo: false
 matrix:
   include:
     - php: 5.2
+      dist: precise
     - php: 5.3
+      dist: precise
     - php: 5.4
     - php: 5.5
     - php: 5.6