diff --git a/app/pgp_utils.py b/app/pgp_utils.py
index 334d8c6d..9d2d08c6 100644
--- a/app/pgp_utils.py
+++ b/app/pgp_utils.py
@@ -7,6 +7,7 @@ from memory_profiler import memory_usage
 from app.config import GNUPGHOME
 from app.log import LOG
 from app.models import Mailbox, Contact
+from app.utils import random_string
 
 gpg = gnupg.GPG(gnupghome=GNUPGHOME)
 gpg.encoding = "utf-8"