diff --git a/content/reference.gmi b/content/reference.gmi
index abee1c3..b4b3e48 100644
--- a/content/reference.gmi
+++ b/content/reference.gmi
@@ -1,4 +1,5 @@
 => /index.gmi   Home
 
-=> html://landchad.net                          Setting up a Gemini server [www]
-=> gemini://rawtext.club/~sloum/spacewalk.gmi   Spacewalk Aggregator
+=> html://landchad.net                                      Setting up a Gemini server [www]
+=> gemini://rawtext.club/~sloum/spacewalk.gmi               Spacewalk Aggregator
+=> html://ploum.net/the-computer-built-to-last-50-years     The Computer Built to Last 50 Years [www]