diff --git a/requirements.txt b/requirements.txt
index c98562d..8754e15 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,10 +12,11 @@ certifi==2019.3.9         # via requests
 chardet==3.0.4            # via requests
 click==7.0                # via open-humans-api
 configparser==3.7.4       # via tini
+dj-database-url==0.5.0    # via django-heroku
 django-crispy-forms==1.7.2
 django-heroku==0.3.1
 django-open-humans==0.1.3
-django==2.2
+django==2.2.8
 env-tools==2.2.0
 gunicorn==19.9.0
 humanfriendly==4.18       # via open-humans-api