diff --git a/src/loaders/google_map_loader.js b/src/loaders/google_map_loader.js
index 3f151425..0ed6c445 100644
--- a/src/loaders/google_map_loader.js
+++ b/src/loaders/google_map_loader.js
@@ -13,7 +13,7 @@ const _customPromise = new Promise((resolve) => {
 });
 
 // TODO add libraries language and other map options
-export default (bootstrapURLKeys, heatmapLibrary) => {
+export default (bootstrapURLKeys, heatMapLibrary) => {
   if (!$script_) {
     $script_ = require('scriptjs'); // eslint-disable-line
   }
@@ -62,7 +62,7 @@ export default (bootstrapURLKeys, heatmapLibrary) => {
     if (heatMapLibrary) {
       bootstrapURLKeys.libraries
         ? bootstrapURLKeys.libraries.append('visualization')
-        : (bootstrapURLKeys['libraries'] = ['visualization']);
+        : (bootstrapURLKeys.libraries = ['visualization']);
       console.warn(
         "heatMapLibrary will be deprecated in the future. Please use bootstrapURLKeys.libraries property instead (libraries=['visualization'])."
       );
@@ -82,7 +82,7 @@ export default (bootstrapURLKeys, heatmapLibrary) => {
       (r, key) => `${r}&${key}=${bootstrapURLKeys[key]}`,
       ''
     );
-    
+
     $script_(
       `${DEFAULT_URL}${API_PATH}${params}${libraries}`,
       () =>