diff --git a/docker/README.md b/docker/README.md
index 286201548..14b80c19e 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -235,7 +235,7 @@ Corresponding `docker-compose.yml` overrides:
       DATABASE_HOST: ""
       DATABASE_PORT: ""
       DATABASE_DATABASE: ""
-      DATABASE_USERAME: ""
+      DATABASE_USERNAME: ""
       DATABASE_PASSWORD: ""
       ...
 ```