diff --git a/.travis.yml b/.travis.yml
index 04ea3b0..b4ede93 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,11 @@
 language: php
 
+dist: xenial
+
+services:
+  - mysql
+  - postgresql
+
 env:
   global:
     - COMPOSER_ROOT_VERSION=4.5.x-dev
diff --git a/composer.json b/composer.json
index f563167..9c65bba 100644
--- a/composer.json
+++ b/composer.json
@@ -25,9 +25,6 @@
         "project-files": [
             "app/src/*"
         ],
-        "branch-alias": {
-            "4.x-dev": "4.5.x-dev"
-        },
         "resources-dir": "_resources"
     },
     "config": {
@@ -35,4 +32,4 @@
     },
     "prefer-stable": true,
     "minimum-stability": "dev"
-}
+}
\ No newline at end of file