diff --git a/README.md b/README.md
index ef90bf6..c4abf91 100644
--- a/README.md
+++ b/README.md
@@ -244,7 +244,7 @@ An updated and organized reading list for illustrating the patterns of scalable,
 	* [AVA: Audit Web Applications at Indeed](https://engineering.indeedblog.com/blog/2018/09/application-scanning/)
 	* [TTL as a Service: Automatic Revocation of Stale Privileges at Yelp](https://engineeringblog.yelp.com/2018/11/ttl-as-a-service.html)
 	* [Enterprise Key Management at Slack](https://slack.engineering/engineering-dive-into-slack-enterprise-key-management-1fce471b178c)	
-	* [Scalability and Authentication at Twitch](https://blog.twitch.tv/en/2019/03/15/how-twitch-addresses-scalability-and-authentication-718d6ed3c471/)
+	* [Scalability and Authentication at Twitch](https://blog.twitch.tv/en/2019/03/15/how-twitch-addresses-scalability-and-authentication/)
 	* [Edge Authentication and Token-Agnostic Identity Propagation at Netflix](https://netflixtechblog.com/edge-authentication-and-token-agnostic-identity-propagation-514e47e0b602)
 	* [Hardening Kubernetes Infrastructure with Cilium at Palantir](https://blog.palantir.com/hardening-palantirs-kubernetes-infrastructure-with-cilium-1c40d4c7ef0)
 	* [Improving Web Vulnerability Management through Automation at Lyft](https://eng.lyft.com/improving-web-vulnerability-management-through-automation-2631570d8415)
@@ -346,7 +346,6 @@ An updated and organized reading list for illustrating the patterns of scalable,
 		* [Elasticsearch Performance Tuning Practice at eBay](https://www.ebayinc.com/stories/blogs/tech/elasticsearch-performance-tuning-practice-at-ebay/)
 		* [Improve Performance using Elasticsearch Plugins (2 parts) at Tinder](https://medium.com/tinder-engineering/how-we-improved-our-performance-using-elasticsearch-plugins-part-2-b051da2ee85b)
 		* [Elasticsearch at Kickstarter](https://kickstarter.engineering/elasticsearch-at-kickstarter-db3c487887fc)
-		* [Elasticsearch at Target](https://tech.target.com/2017/05/25/elasticsearch-cloud.html)
 		* [Log Parsing with Logstash and Google Protocol Buffers at Trivago](https://tech.trivago.com/2016/01/19/logstash_protobuf_codec/)
 		* [Fast Order Search using Data Pipeline and Elasticsearch at Yelp](https://engineeringblog.yelp.com/2018/06/fast-order-search.html)
 		* [Moving Core Business Search to Elasticsearch at Yelp](https://engineeringblog.yelp.com/2017/06/moving-yelps-core-business-search-to-elasticsearch.html)
@@ -377,7 +376,7 @@ An updated and organized reading list for illustrating the patterns of scalable,
 	* [MySQL at Pinterest](https://medium.com/@Pinterest_Engineering/learn-to-stop-using-shiny-new-things-and-love-mysql-3e1613c2ce14)
 	* [PostgreSQL at Twitch](https://blog.twitch.tv/how-twitch-uses-postgresql-c34aa9e56f58)
 	* [Scaling MySQL-based Financial Reporting System at Airbnb](https://medium.com/airbnb-engineering/tracking-the-money-scaling-financial-reporting-at-airbnb-6d742b80f040)
-	* [Scaling MySQL at Wix](https://www.wix.engineering/single-post/scaling-to-100m-mysql-is-a-better-nosql)
+	* [Scaling MySQL at Wix](https://www.wix.engineering/post/scaling-to-100m-mysql-is-a-better-nosql)
 	* [MaxScale (MySQL) Database Proxy at Airbnb](https://medium.com/airbnb-engineering/unlocking-horizontal-scalability-in-our-web-serving-tier-d907449cdbcf)
 	* [Switching from Postgres to MySQL at Uber](https://eng.uber.com/mysql-migration/)
 	* [Handling Growth with Postgres at Instagram](https://engineering.instagram.com/handling-growth-with-postgres-5-tips-from-instagram-d5d7e7ffdfcb)
@@ -767,7 +766,6 @@ An updated and organized reading list for illustrating the patterns of scalable,
 	* [Mapping Tags at Medium](https://medium.engineering/mapping-mediums-tags-1b9a78d77cf0)
 	* [Clustering with the Dirichlet Process Mixture Model in Scala at Monsanto](http://engineering.monsanto.com/2015/11/23/chinese-restaurant-process/)
 	* [Map Pins with DBSCAN & Random Forests at Foursquare](https://engineering.foursquare.com/you-are-probably-here-better-map-pins-with-dbscan-random-forests-9d51e8c1964d)
-	* [Detecting and Preventing Fraud at Uber](https://eng.uber.com/advanced-technologies-detecting-preventing-fraud-uber/)
 	* [Forecasting at Uber](https://eng.uber.com/forecasting-introduction/)
 	* [Financial Forecasting at Uber](https://eng.uber.com/transforming-financial-forecasting-machine-learning/)
 	* [Productionizing ML with Workflows at Twitter](https://blog.twitter.com/engineering/en_us/topics/insights/2018/ml-workflows.html)