diff --git a/requirements.txt b/requirements.txt
index 8779e2e..68aeb16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 dropbox==9.4.0
 Flask==0.10.1
-gunicorn==18.0
+gunicorn==21.1.0
 Markdown==2.4
 redis==2.9.1