diff --git a/packages/core/build/bundle.js b/packages/core/build/bundle.js
index e2aa1a652..bf268d2be 100644
--- a/packages/core/build/bundle.js
+++ b/packages/core/build/bundle.js
@@ -1,6 +1,6 @@
 import './shared';
 import './workers';
 import './index';
-let xyz = window;
+let xyz = typeof window =='undefined'?global:window; ;
 'here.xyz.maps'.split('.').forEach((ns) => xyz = (xyz[ns] = xyz[ns] || {}));
 export default xyz;
diff --git a/packages/core/build/intro.js b/packages/core/build/intro.js
index 0c461b93e..02e0f787f 100644
--- a/packages/core/build/intro.js
+++ b/packages/core/build/intro.js
@@ -9,7 +9,7 @@ function define(dep, factory) {
         const xyz = here.xyz.maps;
         const sharedExports = {};
         shared(sharedExports);
-        xyz.__workerURL = window.URL.createObjectURL(new Blob(['var shared={};('+shared+')(shared);('+worker+')(shared);'], {type: 'text/javascript'}));
+        xyz.__workerURL = URL.createObjectURL(new Blob(['var shared={};('+shared+')(shared);('+worker+')(shared);'], {type: 'text/javascript'}));
         factory(xyz, sharedExports, xyz.common);
     }
 }