diff --git a/requirements.txt b/requirements.txt
index ac05b2b..ff0ff51 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,6 +47,6 @@ simplegeneric==0.8.1
 six==1.11.0
 tornado==5.1
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 wcwidth==0.1.7
 Werkzeug==0.14.1