diff --git a/README.md b/README.md
index 0da2a97cd8..1d970bc048 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ The main SDK class is `BITHockeyManager`. It initializes all modules and provide
 
 1. Before you integrate HockeySDK into your own app, you should add the app to HockeyApp if you haven't already. Read [this how-to](http://support.hockeyapp.net/kb/how-tos/how-to-create-a-new-app) on how to do it.
 2. We also assume that you already have a project in Xcode and that this project is opened in Xcode 4.
+3. The SDK supports iOS 4.0 or newer.
 
 ## Versioning