diff --git a/.travis.yml b/.travis.yml
index 9cd86ab..70015c7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,13 +5,13 @@ sudo: false
 matrix:
   include:
     - php: 5.6
-      env: DB=PGSQL CORE_RELEASE=3.5
+      env: DB=PGSQL CORE_RELEASE=3.6
     - php: 5.6
-      env: DB=SQLITE3 CORE_RELEASE=3.5
+      env: DB=SQLITE3 CORE_RELEASE=3.6
+    - php: 5.6
+      env: DB=MYSQL CORE_RELEASE=3.6
     - php: 5.6
       env: DB=MYSQL CORE_RELEASE=3.5
-    - php: 5.3
-      env: DB=MYSQL CORE_RELEASE=3.1
 
 before_script:
  - phpenv rehash