diff --git a/proxy/README.md b/proxy/README.md
index b5586e80187d..07fcc10b7132 100644
--- a/proxy/README.md
+++ b/proxy/README.md
@@ -157,6 +157,7 @@ Typically, the proxy pattern is used to
 * [Apache Commons Proxy](https://commons.apache.org/proper/commons-proxy/)
 * Mocking frameworks [Mockito](https://site.mockito.org/), 
 [Powermock](https://powermock.github.io/), [EasyMock](https://easymock.org/)
+* Apple UIKit's [UIAppearance](https://developer.apple.com/documentation/uikit/uiappearance)
 
 ## Related patterns