diff --git a/angular8-frontend/package-lock.json b/angular8-frontend/package-lock.json
index be727b2..677fb35 100644
--- a/angular8-frontend/package-lock.json
+++ b/angular8-frontend/package-lock.json
@@ -508,11 +508,18 @@
       }
     },
     "@angular/core": {
-      "version": "7.2.14",
-      "resolved": "https://registry.npmjs.org/@angular/core/-/core-7.2.14.tgz",
-      "integrity": "sha512-XeZZJCyBKSKo0E/7Ef0SfJejmn+E7uBXa5cR1QapafS0Hnrq/hZu/NI039IDU/51NoycMDH2vTV19SmKu9Mkow==",
+      "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/angular8-frontend/package.json b/angular8-frontend/package.json
index e7f1742..f618cd3 100644
--- a/angular8-frontend/package.json
+++ b/angular8-frontend/package.json
@@ -20,7 +20,7 @@
     "@angular/animations": "~7.2.12",
     "@angular/common": "~7.2.12",
     "@angular/compiler": "~7.2.12",
-    "@angular/core": "~7.2.12",
+    "@angular/core": "~11.0.5",
     "@angular/forms": "~7.2.12",
     "@angular/http": "~7.2.12",
     "@angular/platform-browser": "~7.2.12",
diff --git a/angular8-frontend/yarn.lock b/angular8-frontend/yarn.lock
index 3a3a056..9adbbb7 100644
--- a/angular8-frontend/yarn.lock
+++ b/angular8-frontend/yarn.lock
@@ -157,12 +157,12 @@
   dependencies:
     tslib "^1.9.0"
 
-"@angular/core@~7.2.12":
-  version "7.2.15"
-  resolved "https://registry.yarnpkg.com/@angular/core/-/core-7.2.15.tgz#c00d4be0ebe95b70f7631154169509cc97934e9a"
-  integrity sha512-XsuYm0jEU/mOqwDOk2utThv8J9kESkAerfuCHClE9rB2TtHUOGCfekF7lJWqjjypu6/J9ygoPFo7hdAE058ZGg==
+"@angular/core@~11.0.5":
+  version "11.0.5"
+  resolved "https://registry.yarnpkg.com/@angular/core/-/core-11.0.5.tgz#b8c448c3cd4f6dae7327cc1ba4ee2aa29c8dbc26"
+  integrity sha512-XAXWQi7R3ucZXQwx9QK5jSKJeQyRJ53u2dQDpr7R5stzeCy1a5hrNOkZLg9zOTTPcth/6+FrOrRZP9SMdxtw3w==
   dependencies:
-    tslib "^1.9.0"
+    tslib "^2.0.0"
 
 "@angular/forms@~7.2.12":
   version "7.2.15"
@@ -7011,6 +7011,11 @@ tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
+tslib@^2.0.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.0.tgz#7cecaa7f073ce680a05847aa77be941098f36dc3"
+  integrity sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ==
+
 tslint@^5.12.1:
   version "5.20.0"
   resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.0.tgz#fac93bfa79568a5a24e7be9cdde5e02b02d00ec1"