Update README.md

README.md

@@ -162,7 +162,7 @@ if keychain.lastResultCode != noErr { /* Report error */ }
 
 ## Known serious issue
 
-It [has been reported](https://github.com/marketplacer/keychain-swift/issues/15) that the library sometimes returns `nil`  instead of the stored Keychain value. The issue seems to be random and hard to reproduce. It may be connected with [the Keychain issue] reported on Apple developer forums. If you experienced this problem feel free to create an issue so we can discuss it and find solutions of workarounds.
+It [has been reported](https://github.com/marketplacer/keychain-swift/issues/15) that the library sometimes returns `nil`  instead of the stored Keychain value. The issue seems to be random and hard to reproduce. It may be connected with [the Keychain issue](https://forums.developer.apple.com/thread/4743) reported on Apple developer forums. If you experienced this problem feel free to create an issue so we can discuss it and find solutions of workarounds.
 
 ## Demo app