diff --git a/API.md b/API.md
index 4b65dda..cbb1e22 100644
--- a/API.md
+++ b/API.md
@@ -45,7 +45,7 @@ GeoReport v1
 
 #### Client Libraries (API Wrappers)
 
--   [PHP Library](http://github.com/mheadd/PHPOpen311) by Mark Head
+-   [PHP Library](https://github.com/mheadd/PHP-open311) by Mark Head
 
 Inactive APIs
 =============