diff --git a/demo/src/polyfills.ts b/demo/src/polyfills.ts
index 71e3306c57..e8f0664320 100644
--- a/demo/src/polyfills.ts
+++ b/demo/src/polyfills.ts
@@ -47,6 +47,9 @@ import 'core-js/es6/reflect';
 // If you use AOT (and only Angular decorators), you can remove.
 import 'core-js/es7/reflect';
 
+/** IE10 and IE11 requires the following for string normalization */
+import 'unorm/lib/unorm.js';
+
 /**
  * Web Animations `@angular/platform-browser/animations`
  * Only required if AnimationBuilder is used within the application and
diff --git a/package.json b/package.json
index fb1a0674db..472531c72e 100644
--- a/package.json
+++ b/package.json
@@ -83,6 +83,7 @@
     "rxjs": "^6.1.0",
     "stream": "^0.0.2",
     "ts-md5": "^1.2.0",
+    "unorm": "^1.4.1",
     "web-animations-js": "^2.3.1",
     "zone.js": "^0.8.26"
   },