diff --git a/.travis.yml b/.travis.yml
index 09e2932..2342b63 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: php
 php:
+    - 5.5
+    - 5.4
     - 5.3
+    - 5.2
 env:
     - DB=mysql
     - DB=pgsql