diff --git a/babel-plugin-dotenv/index.js b/babel-plugin-dotenv/index.js
index cff3a39..590950b 100644
--- a/babel-plugin-dotenv/index.js
+++ b/babel-plugin-dotenv/index.js
@@ -16,13 +16,15 @@ module.exports = function (data) {
 
                 var configDir = options.configDir ? options.configDir : './';
                 var configFile = options.filename ? options.filename : '.env';
+                var whitelist = options.whitelist;
+                var defaults = options.defaults;
 
                 if (path.node.source.value === options.replacedModuleName) {
                   var config = dotEnv.config({ path: sysPath.join(configDir, configFile), silent: true }) || {};
                   var platformPath = (process.env.BABEL_ENV === 'development' || process.env.BABEL_ENV === undefined)
                                           ? configFile + '.development'
                                           : configFile + '.production';
-                  var config = Object.assign(config, dotEnv.config({ path: sysPath.join(configDir, platformPath), silent: true }));
+                  config = Object.assign(defaults || {}, config, dotEnv.config({ path: sysPath.join(configDir, platformPath), silent: true }));
 
                   path.node.specifiers.forEach(function(specifier, idx){
                     if (specifier.type === "ImportDefaultSpecifier") {
@@ -33,6 +35,9 @@ module.exports = function (data) {
                     if(!(config.hasOwnProperty(importedId))) {
                       throw path.get('specifiers')[idx].buildCodeFrameError('Try to import dotenv variable "' + importedId + '" which is not defined in any ' + configFile + ' files.')
                     }
+                    if (whitelist && !whitelist.includes(importedId)) {
+                      throw path.get('specifiers')[idx].buildCodeFrameError('Try to import dotenv variable "' + importedId + '" which is not included in the whitelist.')
+                    }
 
                     var binding = path.scope.getBinding(localId);
                     binding.referencePaths.forEach(function(refPath){