diff --git a/django_mailbox/transports/imap.py b/django_mailbox/transports/imap.py
index c40a647..b6255b1 100644
--- a/django_mailbox/transports/imap.py
+++ b/django_mailbox/transports/imap.py
@@ -57,7 +57,7 @@ class ImapTransport(EmailTransport):
                 size = each_msg.split(' ')[4].rstrip(')')
                 if int(size) <= int(self.MAX_MSG_SIZE):
                     safe_message_ids.append(uid)
-            except ValueError, e:
+            except ValueError as e:
                 logger.warning("ValueError: %s working on %s" % (e, each_msg[0]))
                 pass
         return safe_message_ids