diff --git a/package-lock.json b/package-lock.json
index e72a1c3..7f7fcce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7711,9 +7711,9 @@
       }
     },
     "tslib": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
-      "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ=="
+      "version": "1.11.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.11.1.tgz",
+      "integrity": "sha512-aZW88SY8kQbU7gpV19lN24LtXh/yD4ZZg6qieAJDDg+YBsJcSmLGK9QpnUjAKVG/xefmvJGd1WUmfpT/g6AJGA=="
     },
     "tslint": {
       "version": "5.20.1",
diff --git a/package.json b/package.json
index b9cd06e..657f57e 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
   },
   "dependencies": {
     "es6-promise": "^4.2.8",
-    "tslib": "^1.10.0",
+    "tslib": "^1.11.1",
     "whatwg-fetch": "^3.0.0"
   }
 }