diff --git a/demo-server/yarn.lock b/demo-server/yarn.lock
index 2fe70b4..e9fc4df 100644
--- a/demo-server/yarn.lock
+++ b/demo-server/yarn.lock
@@ -2618,9 +2618,11 @@ nice-try@^1.0.4:
   integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
 
 node-fetch@^2.3.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.0.tgz#e633456386d4aa55863f676a7ab0daa8fdecb0fd"
-  integrity sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA==
+  version "2.6.7"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.7.tgz#24de9fba827e3b4ae44dc8b20256a379160052ad"
+  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
+  dependencies:
+    whatwg-url "^5.0.0"
 
 node-int64@^0.4.0:
   version "0.4.0"
@@ -3751,6 +3753,11 @@ touch@^3.1.0:
   dependencies:
     nopt "~1.0.10"
 
+tr46@~0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
+  integrity sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=
+
 ts-loader@^7.0.2:
   version "7.0.2"
   resolved "https://registry.yarnpkg.com/ts-loader/-/ts-loader-7.0.2.tgz#465bc904aea4c331e9550e7c7d75dd17a0b7c24c"
@@ -3977,6 +3984,11 @@ watchpack@^1.6.1:
     graceful-fs "^4.1.2"
     neo-async "^2.5.0"
 
+webidl-conversions@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
+  integrity sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=
+
 webpack-cli@^3.3.11:
   version "3.3.11"
   resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.11.tgz#3bf21889bf597b5d82c38f215135a411edfdc631"
@@ -4036,6 +4048,14 @@ webpack@^4.43.0:
     watchpack "^1.6.1"
     webpack-sources "^1.4.1"
 
+whatwg-url@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
+  integrity sha1-lmRU6HZUYuN2RNNib2dCzotwll0=
+  dependencies:
+    tr46 "~0.0.3"
+    webidl-conversions "^3.0.0"
+
 which-module@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"