diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..fcadb2c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+* text eol=lf
diff --git a/src/utilities/writeIndex.js b/src/utilities/writeIndex.js
index eea57fc..d12d96a 100644
--- a/src/utilities/writeIndex.js
+++ b/src/utilities/writeIndex.js
@@ -17,7 +17,7 @@ export default (directoryPaths, options = {}) => {
     const config = readIndexConfig(directoryPath);
     const optionsWithConfig = Object.assign({}, options, {config});
     const siblings = readDirectory(directoryPath, optionsWithConfig);
-    const indexCode = createIndexCode(siblings, {config});
+    const indexCode = createIndexCode(siblings, optionsWithConfig);
     const indexFilePath = path.resolve(directoryPath, 'index.js');
 
     fs.writeFileSync(indexFilePath, indexCode);