diff --git a/README.md b/README.md
index f6df3f68..196ec1bd 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@
 
 ## Requirements
 
-- PHP 5.4 or newer
+- PHP 5.5.9+ or newer
 - [Composer](https://getcomposer.org)
 
 ### Development Requirements