diff --git a/docker-compose-dev.yml b/docker-compose-dev.yml
index ed41685ce..767f24feb 100644
--- a/docker-compose-dev.yml
+++ b/docker-compose-dev.yml
@@ -7,6 +7,7 @@ services:
       args:
         RUNNER_IMAGE: "hexpm/elixir:1.16.2-erlang-26.2.4-debian-bullseye-20240408-slim"
         USER: root
+        MIX_ENV: dev
     image: aeternity/ae_mdw_dev${IMAGE_NAME_SUFFIX:-}:latest
     ports:
       - "4000:4000" #MDW's default port