diff --git a/backend/requirements.txt b/backend/requirements.txt
index 2390c17..e910c74 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -26,6 +26,7 @@ scipy==1.11.4
 pydantic==2.5.3
 pydantic-settings==2.1.0
 python-dotenv==1.0.0
+email-validator==2.1.0
 
 # Authentication
 python-jose[cryptography]==3.3.0