diff --git a/src/index.md b/src/index.md
index a5367dd..9fc33aa 100644
--- a/src/index.md
+++ b/src/index.md
@@ -80,6 +80,8 @@ Django Paddle Subscriptions are used in production at these websites:
 
 The Django Paddle Subscriptions app under the hood uses [paddle-billing-client](https://github.com/websideproject/paddle-billing-client), which was thoroughly crafted by Benjamin Gervan.
 
+In addition to that, Django Paddle Subscriptions uses [currencies](https://pypi.org/project/currencies/), [django-ipware](https://github.com/un33k/django-ipware), and [func-timeout](https://pypi.org/project/func-timeout/).
+
 ## Disclaimer
 
 Django Paddle Subscriptions app is provided without any warranties or guarantees, either explicit or implied.