diff --git a/docs/source/reference/websecurity.md b/docs/source/reference/websecurity.md
index 4b82c8d2..67d9e8f2 100644
--- a/docs/source/reference/websecurity.md
+++ b/docs/source/reference/websecurity.md
@@ -119,12 +119,14 @@ extend to securing the `tcp` sockets as well.
 ## Security audits
 
 We recommend that you do periodic reviews of your deployment's security. It's
-good practice to keep [JupyterHub](https://readthedocs.org/projects/jupyterhub/), [configurable-http-proxy](https://github.com/jupyterhub/configurable-http-proxy), and [nodejs
+good practice to keep [JupyterHub](https://readthedocs.org/projects/jupyterhub/), [configurable-http-proxy][], and [nodejs
 versions](https://github.com/nodejs/Release) up to date.
 
 A handy website for testing your deployment is
 [Qualsys' SSL analyzer tool](https://www.ssllabs.com/ssltest/analyze.html).
 
+[configurable-http-proxy]: https://github.com/jupyterhub/configurable-http-proxy
+
 ## Vulnerability reporting
 
 If you believe you have found a security vulnerability in JupyterHub, or any