diff --git a/README.md b/README.md
index f6492ab..8ef9d31 100755
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ Together with a dedicated [μlogger mobile client](https://github.com/bfabiszews
 - Optional configuration options with ENV variables, for list see [Dockerfile](https://github.com/bfabiszewski/ulogger-server/blob/master/Dockerfile). The variables correspond to main μlogger configuration parameteres.
 - For example: `docker run --name ulogger -e ULOGGER_LANG="pl" -p 8080:80 -d bfabiszewski/ulogger`.
 - You may also build the image yourself. Run `docker build .` from the root folder where `Dockerfile` reside. There are optional build-time arguments that allow you to set default database passwords for root and ulogger users.
-- For example: `docker build --build-arg DB_ROOT_PASS=secret1 --build-arg DB_USER_PASS=secret2`.
+- For example: `docker build --build-arg DB_ROOT_PASS=secret1 --build-arg DB_USER_PASS=secret2 .`.
 
 ## Todo
 - improve track editing