diff --git a/README.md b/README.md
index ce230e8..15541a1 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,6 @@ This list is maintained by [Frederic Cambus](https://www.cambus.net). For update
 - [Official Development Guide](https://nginx.org/en/docs/dev/development_guide.html)
 - [Guide to Nginx Module Development](https://www.evanmiller.org/nginx-modules-guide.html)
 - [Advanced Topics In Nginx Module Development](https://www.evanmiller.org/nginx-modules-guide-advanced.html)
-- [Developing Nginx Modules](https://www.airpair.com/nginx/extending-nginx-tutorial)
 
 ## APIs
 
@@ -70,7 +69,6 @@ This list is maintained by [Frederic Cambus](https://www.cambus.net). For update
 - [GIN - JSON-API framework](http://gin.io/)
 - [Outbound API rate limits: the nginx way](https://www.monterail.com/blog/2011/outbound-api-rate-limits-the-nginx-way)
 - [Using Nginx to comply with a third-party API's rate limits](https://vitobotta.com/2014/01/12/nginx-rate-limits/)
-- [Simple API with Nginx and PostgreSQL](http://rny.io/nginx/postgresql/2013/07/26/simple-api-with-nginx-and-postgresql.html)
 - [Kong - Management Layer for Microservices and APIs](https://konghq.com/kong/)
 
 ## Hacks
@@ -93,7 +91,6 @@ This list is maintained by [Frederic Cambus](https://www.cambus.net). For update
 
 - [Nginx, Lua, and beyond](https://agentzh.org/misc/slides/nginx-lua-and-beyond.pdf)
 - [Pushing Nginx to its limit with Lua](https://blog.cloudflare.com/pushing-nginx-to-its-limit-with-lua/)
-- [Augmenting APIs with Nginx and Lua](https://tech.3scale.net/2013/01/09/augment-your-api-without-touching-it)
 - [Adding OAuth Support to Nginx via Lua](https://chairnerd.seatgeek.com/oauth-support-for-nginx-with-lua/)
 - [Scripting libdrizzle with Lua inside Nginx](https://agentzh.org/misc/slides/libdrizzle-lua-nginx.pdf)
 - [Nginx and Lua](https://web.archive.org/web/20141223070856/http://devblog.mixlr.com/2012/09/01/nginx-lua/)
@@ -121,7 +118,6 @@ This list is maintained by [Frederic Cambus](https://www.cambus.net). For update
 - [Nginx image processing server with OpenResty and Lua](https://leafo.net/posts/creating_an_image_server.html)
 - [Building an OpenResty events server](https://github.com/cagerton/dropthat/)
 - [SysAdvent 2014 - OpenResty, Nginx and Lua](https://sysadvent.blogspot.com/2014/12/day-22-largely-unappreciated.html) ([Source](https://github.com/lusis/sysadvent-2014))
-- [OpenResty (Nginx) with dynamically generated certificates](https://blog.dutchcoders.io/openresty-with-dynamic-generated-certificates/)
 - [Ceryx - A dynamic reverse proxy](https://ide.sourcelair.com/blog/articles/75/ceryx-dynamic-nginx)
 - [An Introduction To OpenResty](https://openmymind.net/An-Introduction-To-OpenResty-Nginx-Lua/)
 - [Programming OpenResty (written by the OpenResty creator)](https://openresty.gitbooks.io/programming-openresty/content/)