diff --git a/lib/core/engine.js b/lib/core/engine.js
index 53c3d064..df22d891 100644
--- a/lib/core/engine.js
+++ b/lib/core/engine.js
@@ -170,7 +170,7 @@ class Engine {
     const cargo = async.queue((task, callback) => {
       generateCode(task.modifiedAsset);
       self.events.once('outputDone', callback);
-    }, 10);
+    }, 3);
     const addToCargo = function (modifiedAsset) {
       cargo.push({modifiedAsset});
     };