diff --git a/app/package-lock.json b/app/package-lock.json
index 201ba6a..e5709a0 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -1054,11 +1054,6 @@
       "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
       "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ=="
     },
-    "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=="
-    },
     "atob": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
@@ -1799,24 +1794,6 @@
         "vary": "~1.1.2"
       }
     },
-    "express-ws": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/express-ws/-/express-ws-4.0.0.tgz",
-      "integrity": "sha512-KEyUw8AwRET2iFjFsI1EJQrJ/fHeGiJtgpYgEWG3yDv4l/To/m3a2GaYfeGyB3lsWdvbesjF5XCMx+SVBgAAYw==",
-      "requires": {
-        "ws": "^5.2.0"
-      },
-      "dependencies": {
-        "ws": {
-          "version": "5.2.2",
-          "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
-          "integrity": "sha512-jaHFD6PFv6UgoIVda6qZllptQsMlDEJkTQcybzzXDYM1XO9Y8em691FGMPmM46WGyLU4z9KMgQN+qrux/nhlHA==",
-          "requires": {
-            "async-limiter": "~1.0.0"
-          }
-        }
-      }
-    },
     "extend-shallow": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-3.0.2.tgz",
@@ -4528,12 +4505,9 @@
       }
     },
     "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=="
     },
     "xdg-basedir": {
       "version": "3.0.0",
diff --git a/app/package.json b/app/package.json
index ab773e9..6a89c4a 100644
--- a/app/package.json
+++ b/app/package.json
@@ -12,7 +12,7 @@
   "license": "MIT",
   "dependencies": {
     "modbus-serial": "7.6.0",
-    "ws": "7.1.2",
+    "ws": "7.4.6",
     "express": "4.17.1",
     
     "@babel/cli": "7.5.5",