diff --git a/package.json b/package.json
index e22de437..eb9c66ad 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "qs": "6.9.4",
     "rxjs": "6.6.0",
     "showdown": "1.9.1",
-    "zone.js": "0.10.3"
+    "zone.js": "0.11.4"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "0.803.12",
diff --git a/yarn.lock b/yarn.lock
index 8bba4d65..614ece0e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8047,6 +8047,11 @@ tslib@^1.10.0, tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0, tslib@^1.9.3:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.13.0.tgz#c881e13cc7015894ed914862d276436fa9a47043"
   integrity sha512-i/6DQjL8Xf3be4K/E6Wgpekn5Qasl1usyw++dAA35Ue5orEn65VIxOA+YvNNl9HV3qv70T7CNwjODHZrLwvd1Q==
 
+tslib@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.2.0.tgz#fb2c475977e35e241311ede2693cee1ec6698f5c"
+  integrity sha512-gS9GVHRU+RGn5KQM2rllAlR3dU6m7AcpJKdtH8gFvQiC4Otgk98XnmMU+nZenHt/+VhnBPWwgrJsyrdcw6i23w==
+
 tslint@5.20.1:
   version "5.20.1"
   resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.1.tgz#e401e8aeda0152bc44dd07e614034f3f80c67b7d"
@@ -8808,7 +8813,9 @@ zen-observable@^0.8.0:
   resolved "https://registry.yarnpkg.com/zen-observable/-/zen-observable-0.8.15.tgz#96415c512d8e3ffd920afd3889604e30b9eaac15"
   integrity sha512-PQ2PC7R9rslx84ndNBZB/Dkv8V8fZEpk83RLgXtYd0fwUgEjseMn1Dgajh2x6S8QbZAFa9p2qVCEuYZNgve0dQ==
 
-zone.js@0.10.3:
-  version "0.10.3"
-  resolved "https://registry.yarnpkg.com/zone.js/-/zone.js-0.10.3.tgz#3e5e4da03c607c9dcd92e37dd35687a14a140c16"
-  integrity sha512-LXVLVEq0NNOqK/fLJo3d0kfzd4sxwn2/h67/02pjCjfKDxgx1i9QqpvtHD8CrBnSSwMw5+dy11O7FRX5mkO7Cg==
+zone.js@0.11.4:
+  version "0.11.4"
+  resolved "https://registry.yarnpkg.com/zone.js/-/zone.js-0.11.4.tgz#0f70dcf6aba80f698af5735cbb257969396e8025"
+  integrity sha512-DDh2Ab+A/B+9mJyajPjHFPWfYU1H+pdun4wnnk0OcQTNjem1XQSZ2CDW+rfZEUDjv5M19SBqAkjZi0x5wuB5Qw==
+  dependencies:
+    tslib "^2.0.0"