diff --git a/.travis.yml b/.travis.yml
index 674b66e..f8ce26c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ services:
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=4.x-dev
+    - COMPOSER_ROOT_VERSION=4.6.x-dev
 
 matrix:
   include: