diff --git a/requirements.txt b/requirements.txt
index 1e95c031..4cdea14e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,6 +34,6 @@ django-tastypie==0.11.0
 pytz==2017.2
 #django-smart-selects==1.0.9
 # django-smart-selects==1.0.9 version is required, but no longer available. Copy committed to repo.
-gunicorn==19.8.1
+gunicorn==23.0.0
 humanize==0.5.1
 docutils==0.15.2