diff --git a/requirements.txt b/requirements.txt
index 4efa05ed01753295eab46ad33c2aee825e02cae1..a1ab91eda96826cbb0ad42dc3d554c683b5794ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ Django==1.11.20
 django-bootstrap-themes==3.3.6
 django-bootstrap3==11.0.0
 future==0.17.1
+gunicorn==19.10.0
 idna==2.8
 lxml==4.3.2
 mysqlclient==1.4.2.post1