diff --git a/lib/utils.js b/lib/utils.js
index 0035183..100112c 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -101,6 +101,7 @@ function resolveRelativePaths(relativePaths, appRootDir) {
 function getExcludedExtensions() {
   return {
     '.json': '.json',
+    '.map': '.map',
     '.node': 'node',
   };
 }