diff --git a/TCWebApp/package-lock.json b/TCWebApp/package-lock.json
index 0b7d5e5..dcb715b 100644
--- a/TCWebApp/package-lock.json
+++ b/TCWebApp/package-lock.json
@@ -449,11 +449,6 @@
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     },
-    "async-limiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
-      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
-    },
     "async-lock": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/async-lock/-/async-lock-1.2.2.tgz",
@@ -3249,12 +3244,9 @@
       }
     },
     "ws": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.1.2.tgz",
-      "integrity": "sha512-gftXq3XI81cJCgkUiAVixA0raD9IVmXqsylCrjRygw4+UOOGzPoxnQ6r/CnVL9i+mDncJo94tSkyrtuuQVBmrg==",
-      "requires": {
-        "async-limiter": "^1.0.0"
-      }
+      "version": "7.4.6",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
+      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A=="
     },
     "xml2js": {
       "version": "0.4.23",
diff --git a/TCWebApp/package.json b/TCWebApp/package.json
index 1cbd0eb..974aa87 100644
--- a/TCWebApp/package.json
+++ b/TCWebApp/package.json
@@ -19,7 +19,7 @@
     "eslint-plugin-promise": ">=4.2.1",
     "eslint-plugin-standard": ">=4.0.1",
     "express": ">=4.17.1",
-    "ws": ">=7.1.2"
+    "ws": ">=7.4.6"
   },
   "description": "---\r page_type: sample\r languages:\r - javascript\r - html\r products:\r - azure-iot-hub\r name: IoTHub data visualization in web application\r urlFragment: web-app-visualization\r description: \"This repo contains code for a web application, which can read temperature and humidity data from IoT Hub and show the real-time data on a web page.\"\r ---",
   "main": "server.js",