diff --git a/.travis.yml b/.travis.yml
index 39a101c..80f05a3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,16 +7,16 @@ php:
 
 env:
   matrix:
-    - DB=MYSQL CORE_RELEASE=3.1
+    - DB=MYSQL CORE_RELEASE=master
 
 matrix:
   include:
     - php: 5.3
       env: DB=PGSQL CORE_RELEASE=master
     - php: 5.4
-      env: DB=MYSQL CORE_RELEASE=3.1
+      env: DB=MYSQL CORE_RELEASE=master
     - php: 5.5
-      env: DB=MYSQL CORE_RELEASE=3.1
+      env: DB=MYSQL CORE_RELEASE=master
 
 before_script:
  - phpenv rehash