Update README.md

Martin Barreto · web-flow · commit 1619ad4fe1cd · 2018-04-10T14:58:55.000-03:00
diff --git a/README.md b/README.md
@@ -290,7 +290,7 @@ settings.style.segmentedControlColor: UIColor?
 ## Requirements
 
 * iOS 8.0+
-* Xcode 8.0+
+* Xcode 9.3+
 
 ## Examples
 
