diff --git a/src/content/docs/reference/hardware-specs.md b/src/content/docs/reference/hardware-specs.md
index 3189874..1268c46 100644
--- a/src/content/docs/reference/hardware-specs.md
+++ b/src/content/docs/reference/hardware-specs.md
@@ -14,8 +14,7 @@ layout that yields those high numbers.
 
 References for everything on this page: HAI's *OmniPro II Product
 Specifications* (part 20A00-2, 2012-10) and *OmniPro II Installation
-Manual 3.2*, both available from
-[quadomated.com](https://www.quadomated.com/technology/automation/home-automation-controller-hai-omnipro-ii/).
+Manual 3.2*.
 
 ## Capacity ceilings