diff --git a/requirements/requirements_synapse.txt b/requirements/requirements_synapse.txt
index f1175178..b108424b 100644
--- a/requirements/requirements_synapse.txt
+++ b/requirements/requirements_synapse.txt
@@ -2,7 +2,7 @@
 tornado==6.5.2
 aiohttp==3.12.15
 aiohttp-socks==0.10.1
-aiosmtplib==3.0.2
+aiosmtplib==4.0.2
 pyOpenSSL==24.2.1
 cryptography==43.0.3
 msgpack==1.1.0