diff --git a/index.js b/index.js
index 1c8b6a8..0279841 100644
--- a/index.js
+++ b/index.js
@@ -33,8 +33,8 @@ module.exports = {
   included(app) {
     this._super.included.apply(this, arguments);
     // parse options from ember-cli-build
-    this.options = app && app.options && app.options.cedar;
-    this.amChartsOptions = this.options && this.options.amCharts;
+    const options = app && app.options;
+    this.amChartsOptions = options && options.cedar && options.cedar.amCharts;
     this.hasAmChartsImports = this.amChartsOptions && this.amChartsOptions.imports && this.amChartsOptions.imports.length > 0;
     // when bundling scripts, need to also serve the amCharts assets
     // that those scripts will dynamically load
@@ -53,8 +53,7 @@ module.exports = {
   treeForVendor (vendorTree) {
     // copy cedar dist files to vendor folder
     var cedarTree = new Funnel(path.dirname(require.resolve('@esri/cedar/dist/umd/cedar.js')), {
-      // TODO: other files? source maps etc?
-      files: ['cedar.js', 'themes/amCharts/calcite.js'],
+      files: ['cedar.js', 'cedar.js.map', 'themes/amCharts/calcite.js'],
       destDir: 'cedar'
     });
     var treesToMerge = [vendorTree, cedarTree];
diff --git a/package.json b/package.json
index c497c9c..95f6afd 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "ember-cli": "~2.18.0",
     "ember-cli-dependency-checker": "^2.0.0",
     "ember-cli-eslint": "^4.2.1",
-    "ember-cli-github-pages": "0.1.2",
+    "ember-cli-github-pages": "^0.1.3",
     "ember-cli-htmlbars-inline-precompile": "^1.0.0",
     "ember-cli-inject-live-reload": "^1.4.1",
     "ember-cli-qunit": "^4.1.1",