diff --git a/core/INSTALL.txt b/core/INSTALL.txt
index 32e8ff6..60fab68 100644
--- a/core/INSTALL.txt
+++ b/core/INSTALL.txt
@@ -14,7 +14,9 @@ REQUIREMENTS AND NOTES
 
 Drupal requires:
 
-- A web server. Apache 2.0 (or greater) & Nginx 1.1 (or greater) are recommended.
+- One of the following recommended web servers:
+  - Apache 2.0 (or greater) (http://httpd.apache.org/).
+  - Nginx 1.1 (or greater) (http://www.nginx.com/).
 - PHP 5.3.5 (or greater) (http://www.php.net/).
 - One of the following databases:
   - MySQL 5.0.15 (or greater) (http://www.mysql.com/).