diff --git a/requirements_py35.txt b/requirements_py35.txt
index bcbdbb2..8b067a5 100644
--- a/requirements_py35.txt
+++ b/requirements_py35.txt
@@ -84,7 +84,7 @@ testpath==0.3.1
 torch==0.4.1
 tornado==5.1
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 Werkzeug==0.14.1