diff --git a/.travis.yml b/.travis.yml
index 94cc6e09..4c84eacf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ cache:
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=4.6.x-dev
+    - COMPOSER_ROOT_VERSION=4.x-dev
     - CORE_RELEASE=master
 
 matrix:
@@ -29,9 +29,9 @@ before_script:
 # Install composer dependencies
   - export PATH=~/.composer/vendor/bin:$PATH
   - composer validate
-  - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.4.x-dev --no-update; fi
-  - if [[ $DB == SQLITE ]]; then composer require silverstripe/sqlite3:2.2.x-dev --no-update; fi
-  - composer require silverstripe/recipe-core:4.6.x-dev silverstripe/admin:1.6.x-dev silverstripe/versioned:1.6.x-dev --no-update
+  - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.x-dev --no-update; fi
+  - if [[ $DB == SQLITE ]]; then composer require silverstripe/sqlite3:2.x-dev --no-update; fi
+  - composer require silverstripe/recipe-core:4.x-dev silverstripe/admin:1.x-dev silverstripe/versioned:1.x-dev --no-update
   - if [[ $PHPCS_TEST ]]; then composer global require squizlabs/php_codesniffer:^3 --prefer-dist --no-interaction --no-progress --no-suggest -o; fi
   - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
 
diff --git a/composer.json b/composer.json
index bce215b3..0bb29571 100644
--- a/composer.json
+++ b/composer.json
@@ -31,9 +31,6 @@
         "phpunit/phpunit": "^5.7"
     },
     "extra": {
-        "branch-alias": {
-            "4.x-dev": "4.6.x-dev"
-        },
         "expose": [
             "javascript"
         ]