diff --git a/examples/todomvc/yarn.lock b/examples/todomvc/yarn.lock
index 1871f2e..9f1a9e4 100644
--- a/examples/todomvc/yarn.lock
+++ b/examples/todomvc/yarn.lock
@@ -1263,7 +1263,7 @@ cookie@0.3.1:
 
 core-js@^1.0.0:
   version "1.2.7"
-  resolved "http://registry.npmjs.org/core-js/-/core-js-1.2.7.tgz#652294c14651db28fa93bd2d5ff2983a4f08c636"
+  resolved "https://registry.npmjs.org/core-js/-/core-js-1.2.7.tgz#652294c14651db28fa93bd2d5ff2983a4f08c636"
 
 core-js@^2.4.0:
   version "2.6.1"
@@ -3910,8 +3910,8 @@ websocket-driver@>=0.5.1:
     websocket-extensions ">=0.1.1"
 
 websocket-extensions@>=0.1.1:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.2.tgz#0e18781de629a18308ce1481650f67ffa2693a5d"
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.4.tgz#7f8473bc839dfd87608adb95d7eb075211578a42"
 
 whatwg-fetch@>=0.10.0:
   version "3.0.0"