diff --git a/docs/tutorial/package.md b/docs/tutorial/package.md
index bdda580..8ad35e6 100644
--- a/docs/tutorial/package.md
+++ b/docs/tutorial/package.md
@@ -49,7 +49,7 @@ Add `typer[all]` to your dependencies:
```console
-$ poetry add typer[all]
+$ poetry add "typer[all]"
// It creates a virtual environment for your project
Creating virtualenv rick-portal-gun-w31dJa0b-py3.6 in /home/rick/.cache/pypoetry/virtualenvs