diff --git a/webservice/ui/package-lock.json b/webservice/ui/package-lock.json
index 6edf672..28ca8ff 100644
--- a/webservice/ui/package-lock.json
+++ b/webservice/ui/package-lock.json
@@ -2160,9 +2160,9 @@
       }
     },
     "chart.js": {
-      "version": "2.9.3",
-      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-2.9.3.tgz",
-      "integrity": "sha512-+2jlOobSk52c1VU6fzkh3UwqHMdSlgH1xFv9FKMqHiNCpXsGPQa/+81AFa+i3jZ253Mq9aAycPwDjnn1XbRNNw==",
+      "version": "2.9.4",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-2.9.4.tgz",
+      "integrity": "sha512-B07aAzxcrikjAPyV+01j7BmOpxtQETxTSlQ26BEYJ+3iUkbNKaOJ/nDbT6JjyqYxseM0ON12COHYdU2cTIjC7A==",
       "requires": {
         "chartjs-color": "^2.1.0",
         "moment": "^2.10.2"
diff --git a/webservice/ui/package.json b/webservice/ui/package.json
index 4fe1729..dbc956d 100644
--- a/webservice/ui/package.json
+++ b/webservice/ui/package.json
@@ -53,7 +53,7 @@
     "webpack-merge": "^4.1.0"
   },
   "dependencies": {
-    "chart.js": "^2.7.0",
+    "chart.js": "^2.9.4",
     "classnames": "^2.2.5",
     "moment": "^2.18.1",
     "mqtt": "^2.13.0",