diff --git a/requirements.txt b/requirements.txt
index 144d903..fd6f190 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,5 +13,5 @@ pycparser==2.18
 pytz==2017.2
 requests==2.18.1
 six==1.10.0
-urllib3==1.21.1
+urllib3==1.26.5
 zope.interface==4.4.2