diff --git a/docker-compose.yml b/docker-compose.yml
index 84504daf86e..85b2ce37e67 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,5 +3,7 @@ version: "3.8"
 services:
   php:
     build: .
+    environment:
+        - COMPOSER_ROOT_VERSION=dev-main
     volumes:
       - .:/etc/rector