diff --git a/.travis.yml b/.travis.yml
index d4e531bc..a1b35dbd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ cache:
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=4.4.x-dev
+    - COMPOSER_ROOT_VERSION=4.5.x-dev
     - CORE_RELEASE=master
 
 matrix:
@@ -31,7 +31,7 @@ before_script:
   - composer validate
   - if [[ $DB == PGSQL ]]; then composer require silverstripe/postgresql:2.1.x-dev --no-update; fi
   - if [[ $DB == SQLITE ]]; then composer require silverstripe/sqlite3:2.0.x-dev --no-update; fi
-  - composer require silverstripe/recipe-core:4.4.x-dev silverstripe/admin:1.4.x-dev silverstripe/versioned:1.4.x-dev --no-update
+  - composer require silverstripe/recipe-core:4.5.x-dev silverstripe/admin:1.5.x-dev silverstripe/versioned:1.5.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 42f178cc..45af5b13 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     },
     "extra": {
         "branch-alias": {
-            "4.x-dev": "4.4.x-dev"
+            "4.x-dev": "4.5.x-dev"
         },
         "expose": [
             "javascript"