diff --git a/agent-identity-portal/backend/requirements.txt b/agent-identity-portal/backend/requirements.txt
index e4a5f1a..9640460 100644
--- a/agent-identity-portal/backend/requirements.txt
+++ b/agent-identity-portal/backend/requirements.txt
@@ -10,7 +10,7 @@ msal==1.31.1
 PyJWT[crypto]==2.10.1
 cryptography==44.0.0
 python-multipart==0.0.18
-aiosmtplib==3.0.2
+aiosmtplib==5.1.1
 email-validator==2.2.0
 azure-identity==1.19.0
 azure-keyvault-secrets==4.9.0