diff --git a/readme.md b/readme.md
index fdd1796..6f3985c 100644
--- a/readme.md
+++ b/readme.md
@@ -3,6 +3,13 @@ entries
 
 Entry registration system for [Rogaining](http://en.wikipedia.org/wiki/Rogaining).
 
+Requirements
+------------
+
+* PHP 5.4
+* MySQL or other similar database
+* composer dependencies
+
 Installation
 ------------
 Run following commands