diff --git a/demo/audio/server/yarn.lock b/demo/audio/server/yarn.lock
index 9d3b3b9..eb9ddfb 100644
--- a/demo/audio/server/yarn.lock
+++ b/demo/audio/server/yarn.lock
@@ -42,8 +42,9 @@
   resolved "https://registry.yarnpkg.com/@protobufjs/pool/-/pool-1.1.0.tgz#09fd15f2d6d3abfa9b65bc366506d6ad7846ff54"
 
 "@protobufjs/utf8@^1.1.0":
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/@protobufjs/utf8/-/utf8-1.1.0.tgz#a777360b5b39a1a2e5106f8e858f2fd2d060c570"
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@protobufjs/utf8/-/utf8-1.1.1.tgz#eaee5900122c110a3dbcb728c0597014a2621774"
+  integrity sha512-oOAWABowe8EAbMyWKM0tYDKi8Yaox52D+HWZhAIJqQXbqe0xI/GV7FhLWqlEKreMkfDjshR5FKgi3mnle0h6Eg==
 
 "@tensorflow/tfjs-converter@0.5.2":
   version "0.5.2"