diff --git a/.travis.yml b/.travis.yml
index 73b9ff5..a2739bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ services:
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=5.x-dev
+    - COMPOSER_ROOT_VERSION=5.6.x-dev
     - TRAVIS_NODE_VERSION="10"
 
 matrix: