diff --git a/.travis.yml b/.travis.yml
index a476023b1..db4c1f43e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,10 @@
 language: php
 php:
+  - '5.3'
+  - '5.4'
+  - '5.5'
   - '5.6'
+  - '7.0'
 before_script:
   - sudo apt-get update
   - sudo apt-get install -y build-essential libssl-dev