diff --git a/app/lib/utils.py b/app/lib/utils.py
index 84c4a75..5ec8644 100644
--- a/app/lib/utils.py
+++ b/app/lib/utils.py
@@ -196,6 +196,9 @@ def email_to_gravatar_url(email="", size=100):
     """
     AD doesn't necessarily have email
     """
+    if email is None:
+        email = ""
+
     hash_string = hashlib.md5(email.encode('utf-8')).hexdigest()
     return "https://s.gravatar.com/avatar/{0}?s={1}".format(hash_string, size)
 
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 57b1e16..5f283c2 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -9,7 +9,6 @@ services:
     container_name: powerdns-admin
     mem_limit: 256M
     memswap_limit: 256M
-    tty: true
     command: /usr/bin/supervisord -c /etc/supervisord.conf
     ports:
       - "9191:9191"