diff --git a/tandoor_recipes/README.md b/tandoor_recipes/README.md
index bf92691de..5e8ec7f8c 100644
--- a/tandoor_recipes/README.md
+++ b/tandoor_recipes/README.md
@@ -33,6 +33,7 @@ Required :
     "DB_TYPE": "list(sqlite|postgresql_external)" # Type of database to use.
     "SECRET_KEY": "str", # Your secret key
     "PORT": 9928 # By default, the webui is available on http://HAurl:9928. If you ever need to change the port, you should never do it within the app, but only through this option
+    "Environment": 0|1 # 1 is debug mode, 0 is normal mode. You should run in normal mode unless actively developing.
 Optional :
     "POSTGRES_HOST": "str?", # Needed for postgresql_external
     "POSTGRES_PORT": "str?", # Needed for postgresql_external