diff --git a/composer.json b/composer.json
index 4e6eb3d609d7d76b438b236151a05a11f696bba2..43da9c49f17264cde768c89d8378697899974954 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "self.version",
+        "drupal/core": "9.0.x-dev",
         "asm89/stack-cors": "1.2.0",
         "composer/installers": "v1.7.0",
         "composer/semver": "1.5.0",