diff --git a/README.md b/README.md
index 1ecd52e..706a751 100644
--- a/README.md
+++ b/README.md
@@ -80,9 +80,11 @@ Then open a web browser to http://localhost:5000
 ### Build with Docker
 
 ```bash
-docker build -t libretranslate .
+docker build [--build-arg with_models=true] -t libretranslate .
 ```
 
+If you want to run the Docker image in a complete offline environment, you need to add the `--build-arg with_models=true` parameter. Then the language models get downloaded during the build process of the image. Otherwise these models get downloaded on the first run of the image/container.
+
 Run the built image:
 
 ```bash