diff --git a/spring-boot-websockets/Angular6Websocket/package-lock.json b/spring-boot-websockets/Angular6Websocket/package-lock.json
index c859dbf..cd38825 100644
--- a/spring-boot-websockets/Angular6Websocket/package-lock.json
+++ b/spring-boot-websockets/Angular6Websocket/package-lock.json
@@ -322,11 +322,18 @@
       }
     },
     "@angular/core": {
-      "version": "6.0.6",
-      "resolved": "https://registry.npmjs.org/@angular/core/-/core-6.0.6.tgz",
-      "integrity": "sha512-7J4wuQ5Bss2GmCptyXSfmgWk/IbCFK/MJwaXOpADLB9iWOkOIvKRSTntb4l6j3OVd9boCbs6Z/xW/HT964iMvw==",
+      "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/spring-boot-websockets/Angular6Websocket/package.json b/spring-boot-websockets/Angular6Websocket/package.json
index aa83633..1f79172 100644
--- a/spring-boot-websockets/Angular6Websocket/package.json
+++ b/spring-boot-websockets/Angular6Websocket/package.json
@@ -14,7 +14,7 @@
     "@angular/animations": "^6.0.2",
     "@angular/common": "^6.0.2",
     "@angular/compiler": "^6.0.2",
-    "@angular/core": "^6.0.2",
+    "@angular/core": "^11.0.5",
     "@angular/forms": "^6.0.2",
     "@angular/http": "^6.0.2",
     "@angular/platform-browser": "^6.0.2",