diff --git a/lib/tools/redownload/imageOptimizer.js b/lib/tools/redownload/imageOptimizer.js
index 042502a..0490025 100644
--- a/lib/tools/redownload/imageOptimizer.js
+++ b/lib/tools/redownload/imageOptimizer.js
@@ -210,7 +210,7 @@ var ImageOptimizer = function() {
         }
 
 
-        imagemin.buffer(imageBody, {use: engine})
+        imagemin.buffer(imageBody, {plugins: [engine]})
 
         .then(function(file) {
             var endTime = Date.now();