diff --git a/lib/utils.js b/lib/utils.js
index a6752d8..be3f636 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,7 +1,8 @@
 'use strict';
 
 function getProp(obj, path, defaultValue) {
-  return obj[path] === undefined ? defaultValue : obj[path];
+  const value = obj[path];
+  return (value === null || value === undefined) ? defaultValue : value;
 }
 
 function setProp(obj, path, value) {
@@ -34,4 +35,4 @@ module.exports = {
   getProp,
   setProp,
   unsetProp,
-};
\ No newline at end of file
+};