diff --git a/angular-window-focus-service/package.json b/angular-window-focus-service/package.json
index 02eb1ef..c3ab5e4 100644
--- a/angular-window-focus-service/package.json
+++ b/angular-window-focus-service/package.json
@@ -15,7 +15,7 @@
   "dependencies": {
     "@angular/common": "^2.3.1",
     "@angular/compiler": "^2.3.1",
-    "@angular/core": "^2.3.1",
+    "@angular/core": "^11.0.5",
     "@angular/forms": "^2.3.1",
     "@angular/http": "^2.3.1",
     "@angular/material": "^2.0.0-beta.1",
diff --git a/angular-window-focus-service/yarn.lock b/angular-window-focus-service/yarn.lock
index 239b29d..15ae83f 100644
--- a/angular-window-focus-service/yarn.lock
+++ b/angular-window-focus-service/yarn.lock
@@ -31,6 +31,12 @@
   version "2.4.5"
   resolved "https://registry.yarnpkg.com/@angular/compiler/-/compiler-2.4.5.tgz#521da325e2e002398e8f9de52cfb03d303729e72"
 
+"@angular/core@^11.0.5":
+  version "11.0.5"
+  resolved "https://registry.yarnpkg.com/@angular/core/-/core-11.0.5.tgz#b8c448c3cd4f6dae7327cc1ba4ee2aa29c8dbc26"
+  dependencies:
+    tslib "^2.0.0"
+
 "@angular/core@^2.3.1":
   version "2.4.5"
   resolved "https://registry.yarnpkg.com/@angular/core/-/core-2.4.5.tgz#8b05156398afde9636e65527ffb61fc74236af5a"
@@ -5083,6 +5089,10 @@ tsickle@^0.2:
     source-map "^0.5.6"
     source-map-support "^0.4.2"
 
+tslib@^2.0.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.0.tgz#7cecaa7f073ce680a05847aa77be941098f36dc3"
+
 tslint-loader@^3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/tslint-loader/-/tslint-loader-3.3.0.tgz#6e6a50fc82e85ff3d1cb53e23dd24ae9e47d91ea"