diff --git a/README.md b/README.md
index ff46a74..2ecce07 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ This is for client certificates.
 
 ## Motivation
 
-This was written with hashbang.sh in mind - a open registration shell server.
+This was written with [hashbang.sh](https://hashbang.sh/) in mind - a open registration shell server.
 SSH keys are used for authenticating with hashbang.sh machines, but users might want to connect to services using TLS or send signed and/or encrypted email.
 
 ## Design