diff --git a/requirements/common.txt b/requirements/common.txt
index b2ec67418c..4d6ad51a75 100644
--- a/requirements/common.txt
+++ b/requirements/common.txt
@@ -37,7 +37,7 @@ qrcode==6.1
 python-magic==0.4.15
 python-dotenv==0.13.0
 python-geoip==1.2
-marrow.mailer==4.0
+marrow.mailer==4.0.3
 flask-cors==3.0.8
 python-pentabarf-xml==0.20
 python-geoip-geolite2==2015.303