diff --git a/blueprints/stack-auth/docker-compose.yml b/blueprints/stack-auth/docker-compose.yml
index 603dc81..8cf9633 100644
--- a/blueprints/stack-auth/docker-compose.yml
+++ b/blueprints/stack-auth/docker-compose.yml
@@ -29,6 +29,7 @@ services:
       - STACK_SEED_INTERNAL_PROJECT_SIGN_UP_ENABLED=${STACK_SEED_INTERNAL_PROJECT_SIGN_UP_ENABLED}
       - STACK_RUN_MIGRATIONS=${STACK_RUN_MIGRATIONS}
       - STACK_RUN_SEED_SCRIPT=${STACK_RUN_SEED_SCRIPT}
+      - STACK_EMAIL_HOST=${STACK_EMAIL_HOST}
     depends_on:
       - stack-auth-db
     ports: