diff --git a/guide/english/software-engineering/design-patterns/singleton/index.md b/guide/english/software-engineering/design-patterns/singleton/index.md
index 30e60272cf..bd3e56a500 100644
--- a/guide/english/software-engineering/design-patterns/singleton/index.md
+++ b/guide/english/software-engineering/design-patterns/singleton/index.md
@@ -124,7 +124,7 @@ Out[3]: <__main__.MyClass at 0x111130da0>
 
 ## Singleton in iOS
 
-```Swift4
+```swift
 
 class Singleton {
   static let sharedInstance = Singleton()