diff --git a/src/postmarker/django/__init__.py b/src/postmarker/django/__init__.py
index fdda424..63cab0e 100644
--- a/src/postmarker/django/__init__.py
+++ b/src/postmarker/django/__init__.py
@@ -1,2 +1,2 @@
 from .backend import EmailBackend, PostmarkEmailMessage, PostmarkEmailMixin, PostmarkEmailMultiAlternatives  # noqa
-from .signals import post_send, pre_send  # noqa
+from .signals import post_send, pre_send, on_exception  # noqa