diff --git a/backend/requirements.txt b/backend/requirements.txt
index 303c08d..0f6d3a4 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -5,6 +5,7 @@ alembic==1.13.1
 psycopg2-binary==2.9.9
 python-jose[cryptography]==3.3.0
 passlib[bcrypt]==1.7.4
+bcrypt<4.0.0
 python-multipart==0.0.9
 pydantic[email]==2.7.1
 pydantic-settings==2.2.1