diff --git a/README.markdown b/README.markdown
index 9c630bb..ee7e9cc 100644
--- a/README.markdown
+++ b/README.markdown
@@ -9,7 +9,7 @@ The award winning AutoDMG takes an OS X installer and builds a system image, sui
 System Requirements
 -------------------
 
-AutoDMG requires Mac OS X 10.8 or newer.
+AutoDMG requires Mac OS X 10.9 or newer.
 
 
 Presentation