diff --git a/affine.yaml b/affine.yaml
index 2ad7c6b..d7d6ed9 100644
--- a/affine.yaml
+++ b/affine.yaml
@@ -23,6 +23,7 @@ services:
       - DATABASE_URL=postgresql://${DB_USERNAME}:${DB_PASSWORD}@postgres:5432/${DB_DATABASE:-affine}
       - AFFINE_INDEXER_ENABLED=false
       - AFFINE_DISABLE_DEMO_WORKSPACE=true
+      - AFFINE_DISABLE_SIGNUP=true
     restart: unless-stopped
 
   affine_migration: