diff --git a/visualization/dash/avocado_analytics/apps/app_4/requirements.txt b/visualization/dash/avocado_analytics/apps/app_4/requirements.txt
index d25846c..f85e4cb 100644
--- a/visualization/dash/avocado_analytics/apps/app_4/requirements.txt
+++ b/visualization/dash/avocado_analytics/apps/app_4/requirements.txt
@@ -1,3 +1,3 @@
 dash==1.13.3
 pandas==1.0.5
-gunicorn==20.0.4
+gunicorn==22.0.0