diff --git a/README.md b/README.md
index dc11a81..2a23ace 100644
--- a/README.md
+++ b/README.md
@@ -771,6 +771,7 @@ An updated and organized reading list for illustrating the patterns of scalable,
 	* [ML Feature Serving Infrastructure at Lyft](https://eng.lyft.com/ml-feature-serving-infrastructure-at-lyft-d30bf2d3c32a)
 	* [Context-Specific Bidding System at Etsy](https://codeascraft.com/2021/03/23/how-we-built-a-context-specific-bidding-system-for-etsy-ads/)
 	* [Moderating Promotional Spam and Inappropriate Content in Photos at Scale at Yelp](https://engineeringblog.yelp.com/2021/05/moderating-promotional-spam-and-inappropriate-content-in-photos-at-scale-at-yelp.html)
+	* [Optimizing Payments with Machine Learning at Dropbox](https://dropbox.tech/machine-learning/optimizing-payments-with-machine-learning)
 
 ## Architecture
 * [Systems We Make](https://systemswemake.com/)