diff --git a/requirements.txt b/requirements.txt
index 28fdaf9..3877f83 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ six==1.11.0
 testtools==2.3.0
 toolz==0.9.0
 traceback2==1.4.0
-twisted[tls]==18.7.0
+twisted[tls]==19.7.0
 txspinneret==0.1.3
 unittest2==1.1.0
 zope.interface==4.5.0