diff --git a/requirements.txt b/requirements.txt
index a69953b..80b5ece 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ decorator==3.4.0
 Flask==0.10.1
 gevent==1.0.1
 greenlet==0.4.2
+gunicorn==19.2
 itsdangerous==0.24
 Jinja2==2.7.2
 MarkupSafe==0.23