diff --git a/requirements.txt b/requirements.txt
index 72f6c37..89afbb6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -75,7 +75,7 @@ singledispatch==3.4.0.3
 six==1.10.0
 sympy==1.0
 tornado==4.4.2
-Twisted==16.0.0
+Twisted==20.3.0
 urllib3==1.13.1
 uTidylib==0.2
 wrapt==1.10.8