diff --git a/.travis.yml b/.travis.yml
index 210aeefa..13eff7d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ before_script:
   - echo "USE mysql;\nUPDATE user SET password=PASSWORD('dev') WHERE user='root';\nFLUSH PRIVILEGES;\n" | mysql -u root
 language: php
 php:
+  - '5.5'
+  - '5.6'
   - '7.0'
   - nightly
 after_failure: "cat /tmp/icehrm.test.log"