diff --git a/.travis.yml b/.travis.yml
index b87ce25..a226605 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ addons:
 env:
   global:
     - TRAVIS_NODE_VERSION="6"
-    - COMPOSER_ROOT_VERSION="4.2.x-dev"
+    - COMPOSER_ROOT_VERSION="4.3.x-dev"
     - DISPLAY=":99"
     - XVFBARGS=":99 -ac -screen 0 1024x768x16"
     - SS_BASE_URL="http://localhost:8080/"