diff --git a/composer.json b/composer.json
index 31e54857efdf18a22728929ef9a34672ecef622c..b3530f08f5de0ba58b7a2c5ed6f355e3e165b860 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "9.0.x-dev",
+        "drupal/core": "9.1.x-dev",
         "asm89/stack-cors": "1.3.0",
         "composer/installers": "v1.8.0",
         "composer/semver": "1.5.1",