diff --git a/requirements.txt b/requirements.txt
index 18130bf6..1403cc56 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ service-identity==18.1.0
 simplejson==3.17.0
 six==1.14.0               # via autobahn, automat, cryptography, ecdsa, firebase-admin, google-api-core, google-api-python-client, google-auth, google-resumable-media, grpcio, marshmallow-polyfield, oauth2client, protobuf, pyhamcrest, pyopenssl, python-dateutil, python-jose, treq, txaio
 treq==18.6.0
-twisted[tls]==19.10.0
+twisted[tls]==20.3.0
 txaio==18.8.1             # via autobahn
 typing==3.7.4.1
 ua-parser==0.9.0