diff --git a/src/index.js b/src/index.js
index f0d9e1c..d7084a9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -29,7 +29,7 @@ function reachedRoot(candidatePath) {
 	return /^(?:\/|[a-z]:\\)$/i.test(candidatePath);
 }
 
-module.exports = function(options) {
+module.exports = function(options = {}) {
 	let currentPath = defaultValue(options.basePath, __dirname);
 	let checker = defaultValue(options.checker, "package.json");