diff --git a/backend/requirements.txt b/backend/requirements.txt
index 047c131..f2c6174 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -22,7 +22,7 @@ httpx==0.28.1
 stripe==14.4.1
 
 # Email & Mail Processing
-aiosmtplib==3.0.1
+aiosmtplib==5.1.0
 aiohttp==3.13.4  # Updated: Fixed zip bomb, DoS, and directory traversal vulnerabilities (was 3.9.1)
 aioimaplib==2.0.1
 email-validator==2.1.0.post1