diff --git a/README.md b/README.md
index 08ca06b5..e63865d8 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 ### :warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning:
 ### Security Notice 
 
-### Please upgrade to version `>=5.1.14` (backwards compatible) or `6.x` (one tiny breaking change) to fix some potential security vulnerabilities 
+### Please upgrade to version `>=5.1.4` (backwards compatible) or `6.x` (one tiny breaking change) to fix some potential security vulnerabilities 
 ### :warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning::warning:
 
 [![Latest Version](http://img.shields.io/packagist/v/league/oauth2-server.svg?style=flat-square)](https://github.com/thephpleague/oauth2-server/releases)