diff --git a/crawlab/.gitignore b/crawlab/.gitignore
index e043754d..ccc81841 100644
--- a/crawlab/.gitignore
+++ b/crawlab/.gitignore
@@ -110,3 +110,5 @@ node_modules/
 
 # egg-info
 *.egg-info
+
+tmp/
diff --git a/crawlab/bin/run_worker.py b/crawlab/bin/run_worker.py
index 92bf85d5..69edcbc6 100644
--- a/crawlab/bin/run_worker.py
+++ b/crawlab/bin/run_worker.py
@@ -13,7 +13,7 @@ import tasks.spider
 import tasks.deploy
 
 if __name__ == '__main__':
-    if sys.platform == 'windows':
+    if 'win' in sys.platform:
         celery_app.start(argv=['tasks', 'worker', '-P', 'eventlet', '-E', '-l', 'INFO'])
     else:
         celery_app.start(argv=['tasks', 'worker', '-E', '-l', 'INFO'])
diff --git a/crawlab/routes/base.py b/crawlab/routes/base.py
index 1578b3f8..e068e4a2 100644
--- a/crawlab/routes/base.py
+++ b/crawlab/routes/base.py
@@ -111,7 +111,7 @@ class BaseApi(Resource):
 
         self.after_update()
 
-        return item
+        return jsonify(item)
 
     def update(self, id: str = None) -> (dict, tuple):
         """
@@ -137,7 +137,7 @@ class BaseApi(Resource):
         # execute after_update hook
         self.after_update(id)
 
-        return item
+        return jsonify(item)
 
     def post(self, id: str = None, action: str = None):
         """