diff --git a/Calculator/angular/CalcWebUI/package-lock.json b/Calculator/angular/CalcWebUI/package-lock.json
index 4c197b5..4323ea8 100644
--- a/Calculator/angular/CalcWebUI/package-lock.json
+++ b/Calculator/angular/CalcWebUI/package-lock.json
@@ -471,11 +471,18 @@
       }
     },
     "@angular/core": {
-      "version": "8.2.6",
-      "resolved": "https://registry.npmjs.org/@angular/core/-/core-8.2.6.tgz",
-      "integrity": "sha512-l+BrvPGwtPUh/rQyB9mjtonMsFEAoRHgDYWeQu/QukIZbItNdFqrhewn2zQ8Skx75BpwFLAVIVXp9ioDyvP2eQ==",
+      "version": "11.0.5",
+      "resolved": "https://registry.npmjs.org/@angular/core/-/core-11.0.5.tgz",
+      "integrity": "sha512-XAXWQi7R3ucZXQwx9QK5jSKJeQyRJ53u2dQDpr7R5stzeCy1a5hrNOkZLg9zOTTPcth/6+FrOrRZP9SMdxtw3w==",
       "requires": {
-        "tslib": "^1.9.0"
+        "tslib": "^2.0.0"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.4.0",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.4.0.tgz",
+          "integrity": "sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ=="
+        }
       }
     },
     "@angular/forms": {
diff --git a/Calculator/angular/CalcWebUI/package.json b/Calculator/angular/CalcWebUI/package.json
index 7031a3c..6dbe448 100644
--- a/Calculator/angular/CalcWebUI/package.json
+++ b/Calculator/angular/CalcWebUI/package.json
@@ -16,7 +16,7 @@
     "@angular/cdk": "^8.2.0",
     "@angular/common": "^8.2.6",
     "@angular/compiler": "~8.2.6",
-    "@angular/core": "^8.2.6",
+    "@angular/core": "^11.0.5",
     "@angular/forms": "^8.2.6",
     "@angular/material": "^8.2.0",
     "@angular/platform-browser": "~8.2.6",