Update dependencies.

Author: toddbirchard

Pipfile.lock

@@ -41,6 +41,16 @@ $ pipenv update
 $ flask run
 ```
 
+**Installation via [Poetry](https://python-poetry.org/)**:
+
+```shell
+$ git clone https://github.com/hackersandslackers/plotlydash-flask-tutorial.git
+$ cd plotlydash-flask-tutorial
+$ poetry shell
+$ poetry update
+$ poetry run
+```
+
 ## Usage
 
 Replace the values in **.env.example** with your values and rename this file to **.env**:
@@ -58,4 +68,4 @@ Replace the values in **.env.example** with your values and rename this file to
 
 -----
 
-**Hackers and Slackers** tutorials are free of charge. If you found this tutorial helpful, a [small donation](https://www.buymeacoffee.com/hackersslackers) would be greatly appreciated to keep us in business. All proceeds go towards coffee, and all coffee goes towards more content.
+**Hackers and Slackers** tutorials are free of charge. If you found this tutorial helpful, a [small donation](https://www.buymeacoffee.com/hackersslackers) would be greatly appreciated to keep us in business. All proceeds go towards coffee, and all coffee goes towards more content.