diff --git a/pflaenzli/pflaenzli_django/settings.py b/pflaenzli/pflaenzli_django/settings.py
index 9a81db2..eec84c4 100644
--- a/pflaenzli/pflaenzli_django/settings.py
+++ b/pflaenzli/pflaenzli_django/settings.py
@@ -32,8 +32,8 @@ SECRET_KEY = "django-insecure-q=ps#iypevr!3zfpwtfp3lw#4r3%oyj*(2=*iq^8f4_zbodi^(
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True
 
-ALLOWED_HOSTS = os.getenv('DJANGO_ALLOWED_HOSTS').split(',')
-CSRF_TRUSTED_ORIGINS = os.getenv('DJANGO_CSRF_TRUSTED_ORIGINS').split(',')
+ALLOWED_HOSTS = os.getenv('DJANGO_ALLOWED_HOSTS', '').split(',')
+CSRF_TRUSTED_ORIGINS = os.getenv('DJANGO_CSRF_TRUSTED_ORIGINS', '').split(',')
 
 # Application definition