diff --git a/requirements.txt b/requirements.txt
index a36084bef..b24f1513d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,5 +38,6 @@ psycopg2>=2.8
 python-dateutil>=2.8.0
 SQLAlchemy>=1.3.13
 Flask-Security-Too>=3.0.0
+bcrypt<=3.1.7
 sshtunnel>=0.1.5
 ldap3>=2.5.1