diff --git a/source-code-demo/src/react/fixtures/fiber-debugger/yarn.lock b/source-code-demo/src/react/fixtures/fiber-debugger/yarn.lock
index 1bbad15..652a674 100644
--- a/source-code-demo/src/react/fixtures/fiber-debugger/yarn.lock
+++ b/source-code-demo/src/react/fixtures/fiber-debugger/yarn.lock
@@ -5183,8 +5183,8 @@ websocket-driver@>=0.3.6, websocket-driver@>=0.5.1:
     websocket-extensions ">=0.1.1"
 
 websocket-extensions@>=0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.1.tgz#76899499c184b6ef754377c2dbb0cd6cb55d29e7"
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.4.tgz#7f8473bc839dfd87608adb95d7eb075211578a42"
 
 whatwg-encoding@^1.0.1:
   version "1.0.1"