diff --git a/lib/obj.js b/lib/obj.js
index e5e915e..597c8d6 100644
--- a/lib/obj.js
+++ b/lib/obj.js
@@ -279,7 +279,7 @@ function getImages(inputPath, materials) {
         }
         promises.push(loadImage(imagePath));
     }
-    Promise.all(promises).then(function(imageInfoArray) {
+    return Promise.all(promises).then(function(imageInfoArray) {
         var imageInfoArrayLength = imageInfoArray.length;
         for (var j = 0; j < imageInfoArrayLength; j++) {
             var image = images[j];