diff --git a/modoboa/lib/smtp_backend.py b/modoboa/lib/smtp_backend.py
index 7e6ded249..88a86776d 100644
--- a/modoboa/lib/smtp_backend.py
+++ b/modoboa/lib/smtp_backend.py
@@ -1,6 +1,6 @@
 """Custom SMTP email backend."""
 
-from django.core.mail.backends import EmailBackend
+from django.core.mail.backends.smtp import EmailBackend
 from django.core.mail.utils import DNS_NAME
 
 from modoboa.lib import oauth2