diff --git a/demo/yarn.lock b/demo/yarn.lock
index 6be786c..b1541fa 100644
--- a/demo/yarn.lock
+++ b/demo/yarn.lock
@@ -15,7 +15,7 @@ cipher-base@^1.0.1:
 
 create-hash@^1.2.0:
   version "1.2.0"
-  resolved "http://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz#889078af11a63756bcfb59bd221996be3a9ef196"
+  resolved "https://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz#889078af11a63756bcfb59bd221996be3a9ef196"
   dependencies:
     cipher-base "^1.0.1"
     inherits "^2.0.1"
@@ -100,13 +100,13 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.2:
 
 sha.js@^2.4.0:
   version "2.4.11"
-  resolved "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
+  resolved "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
   dependencies:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
 ws@^6.1.0:
-  version "6.1.2"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.2.tgz#3cc7462e98792f0ac679424148903ded3b9c3ad8"
+  version "6.2.3"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.3.tgz#ccc96e4add5fd6fedbc491903075c85c5a11d9ee"
   dependencies:
     async-limiter "~1.0.0"