diff --git a/composer.json b/composer.json
index cdaa347c3..f81c08ddc 100644
--- a/composer.json
+++ b/composer.json
@@ -105,7 +105,7 @@
             "forward-command": false
         },
         "branch-alias": {
-            "dev-master": "4.x-dev"
+            "dev-main": "4.x-dev"
         }
     }
 }
diff --git a/composer.lock b/composer.lock
index a841b4a1b..0cba07131 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "e5524063b58e7a1820e5ce6c164a41b1",
+    "content-hash": "5a03f753ef6f65bc4933d5c68be662e7",
     "packages": [
         {
             "name": "amphp/amp",