diff --git a/requirements.txt b/requirements.txt
index 9d421e2..24818a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,6 +32,6 @@ six==1.10.0
 treq==17.3.1
 Twisted==17.5.0
 typed-ast==1.0.4
-urllib3==1.21.1
+urllib3==1.26.5
 zope.interface==4.4.2
 pytz