diff --git a/src/demo3/package-lock.json b/src/demo3/package-lock.json
index a05e703..bacce8a 100644
--- a/src/demo3/package-lock.json
+++ b/src/demo3/package-lock.json
@@ -570,9 +570,9 @@
       "dev": true
     },
     "bl": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
-      "integrity": "sha512-wbgvOpqopSr7uq6fJrLH8EsvYMJf9gzfo2jCsL2eTy75qXPukA4pCgHamOQkZtY5vmfVtjB+P3LNlMHW5CEZXA==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
+      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
       "requires": {
         "readable-stream": "^2.3.5",
         "safe-buffer": "^5.1.1"
@@ -3162,9 +3162,9 @@
       "dev": true
     },
     "msgpack5": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/msgpack5/-/msgpack5-4.2.1.tgz",
-      "integrity": "sha512-Xo7nE9ZfBVonQi1rSopNAqPdts/QHyuSEUwIEzAkB+V2FtmkkLUbP6MyVqVVQxsZYI65FpvW3Bb8Z9ZWEjbgHQ==",
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/msgpack5/-/msgpack5-4.5.1.tgz",
+      "integrity": "sha512-zC1vkcliryc4JGlL6OfpHumSYUHWFGimSI+OgfRCjTFLmKA2/foR9rMTOhWiqfOrfxJOctrpWPvrppf8XynJxw==",
       "requires": {
         "bl": "^2.0.1",
         "inherits": "^2.0.3",
diff --git a/src/demo3/package.json b/src/demo3/package.json
index f7fb68c..e7c6ed5 100644
--- a/src/demo3/package.json
+++ b/src/demo3/package.json
@@ -24,7 +24,7 @@
   "dependencies": {
     "@aspnet/signalr": "^1.1.2",
     "@aspnet/signalr-protocol-msgpack": "^1.1.0",
-    "msgpack5": "^4.2.1",
+    "msgpack5": "^4.5.1",
     "vue": "^2.6.8",
     "vue-loader": "^15.7.0"
   }