diff --git a/requirements.txt b/requirements.txt
index 451b67e..e19de98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ requests==2.17.3
 simplegeneric==0.8.1
 six==1.10.0
 traitlets==4.3.2
-urllib3==1.21.1
+urllib3==1.26.5
 vine==1.1.3
 virtualenv==15.1.0
 wcwidth==0.1.7