diff --git a/.travis.yml b/.travis.yml
index 2add223..ebc42ad 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,6 @@ php:
   - 5.4
   - 5.5
 
-env:
-  - CUBRID_VERSION=9.1.0
-
 services:
   - redis-server
   - memcached