diff --git a/docs/Categories.md b/docs/Categories.md
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@@ -1,6 +1,6 @@
 # HomeSpan Accessory Categories
 
-Every HomeSpan device must be assigned a HomeKit Accessory Category. HomeSpan implements these categories as C++ Classes with names that exactly match the spelling and capitalization specified by Apple in Section 13 of [HAP-R2](https://developer.apple.com/homekit/specification/), but without any spaces.  HomeSpan Accessory Categories are defined in HomeSpan's `Category` namespace.  For example, HomeSpan defines the *Garage Door Openers* Category (HAP Category 4) as `Category::GarageDoorOpeners`, which could be used when initializing HomeSpan as follows:
+Every HomeSpan device must be assigned a HomeKit Accessory Category. HomeSpan implements these categories as C++ Classes with names that exactly match the spelling and capitalization specified by Apple in Section 13 of HAP-R2, but without any spaces.  HomeSpan Accessory Categories are defined in HomeSpan's `Category` namespace.  For example, HomeSpan defines the *Garage Door Openers* Category (HAP Category 4) as `Category::GarageDoorOpeners`, which could be used when initializing HomeSpan as follows:
 
 ```C++
 homeSpan.begin(Category::GarageDoorOpeners,"Acme Garage Door Lifts");