diff --git a/README.md b/README.md
index 1b4161c..cf57f8e 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,6 @@ Add this to your `.bashrc`:
 ```
 . $HOME/.bash-prompt/prompt.sh
 ```
+
+Optionally create a `.env` file (in the repo root) to customize the look.
+You can find the available variables in `prompt.sh`.