diff --git a/.travis.yml b/.travis.yml
index 1bd7c6b2..564e47b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ addons:
 env:
   global:
     - TRAVIS_NODE_VERSION="6"
-    - COMPOSER_ROOT_VERSION="4.0.x-dev"
+    - COMPOSER_ROOT_VERSION="4.x-dev"
     - DISPLAY=":99"
     - XVFBARGS=":99 -ac -screen 0 1024x768x16"
     - SS_BASE_URL="http://localhost:8080/"
@@ -45,10 +45,10 @@ before_script:
 # Install composer dependencies
   - composer validate
   - composer install --prefer-dist
-  - composer require --prefer-dist --no-update silverstripe/recipe-cms:1.0.x-dev
+  - composer require --prefer-dist --no-update silverstripe/recipe-cms:1.1.x-dev
   - composer update
-  - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.0.x-dev --prefer-dist; fi
-  - if [[ $DB == SQLITE ]]; then composer require silverstripe/sqlite3:2.0.x-dev --prefer-dist; fi
+  - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.1.x-dev --prefer-dist; fi
+  - if [[ $DB == SQLITE ]]; then composer require silverstripe/sqlite3:2.1.x-dev --prefer-dist; fi
   - if [[ $PHPCS_TEST ]]; then composer global require squizlabs/php_codesniffer:^3 --prefer-dist --no-interaction --no-progress --no-suggest -o; fi
 
 # Install NPM dependencies
diff --git a/composer.json b/composer.json
index cbdabde9..c7a80c34 100644
--- a/composer.json
+++ b/composer.json
@@ -19,13 +19,12 @@
         }
     ],
     "require": {
-        "composer/installers": "*",
-        "silverstripe/admin": "^1@dev",
-        "silverstripe/campaign-admin": "^1@dev",
-        "silverstripe/framework": "^4@dev",
-        "silverstripe/reports": "^4@dev",
-        "silverstripe/siteconfig": "^4@dev",
-        "silverstripe/versioned": "^1@dev",
+        "silverstripe/admin": "^1.1@dev",
+        "silverstripe/campaign-admin": "^1.1@dev",
+        "silverstripe/framework": "^4.1@dev",
+        "silverstripe/reports": "^4.1@dev",
+        "silverstripe/siteconfig": "^4.1@dev",
+        "silverstripe/versioned": "^1.1@dev",
         "silverstripe/vendor-plugin": "^1.0"
     },
     "require-dev": {