diff --git a/requirements.txt b/requirements.txt
index c98562d..afa52fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,6 +12,7 @@ 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
@@ -32,6 +33,6 @@ requests==2.21.0
 six==1.12.0               # via env-tools, python-dateutil, tini
 sqlparse==0.3.0           # via django
 tini==3.0.1               # via env-tools
-urllib3==1.24.1           # via requests
+urllib3==1.24.2           # via requests
 vine==1.3.0               # via amqp, celery
 whitenoise==4.1.2         # via django-heroku