diff --git a/README.md b/README.md
index 9296246f5..4e8294c72 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ uv pip install flask                # Install Flask.
 uv pip install -r requirements.txt  # Install from a requirements.txt file.
 uv pip install -e .                 # Install the current project in editable mode.
 uv pip install "package @ ."        # Install the current project from disk
+uv pip install "flask[dotenv]"      # Install Flask with "dotenv" extra.
 ```
 
 To generate a set of locked dependencies from an input file: