diff --git a/authserver/requirements.txt b/authserver/requirements.txt
index 479e5ad..a302475 100644
--- a/authserver/requirements.txt
+++ b/authserver/requirements.txt
@@ -2,6 +2,7 @@ certifi==2021.5.30
 charset-normalizer==2.0.4
 click==7.1.2
 Flask==1.1.2
+gunicorn==20.1.0
 idna==3.2
 itsdangerous==1.1.0
 Jinja2==2.11.3