diff --git a/webapp/app.py b/webapp/app.py
index 1bca36aa..20221c8a 100644
--- a/webapp/app.py
+++ b/webapp/app.py
@@ -12,4 +12,4 @@ def hello():
 if __name__ == '__main__':
     # Bind to PORT if defined, otherwise default to 5000.
     port = int(os.environ.get('PORT', 5000))
-    app.run(host='0.0.0.0', port=port)
+    app.run(host='0.0.0.0', port=port, threaded=True)