diff --git a/setup.py b/setup.py
index 2180459..424b0cf 100644
--- a/setup.py
+++ b/setup.py
@@ -59,7 +59,8 @@ setup(
         'matplotlib==3.3.3',
         'bokeh==2.2.3',
         'pandas==1.1.5',
-        'flydenity==0.1.5'
+        'flydenity==0.1.5',
+        'gunicorn==20.0.4'
     ],
     test_require=[
         'pytest==5.0.1',