diff --git a/requirements.txt b/requirements.txt
index 7049a04..8343a92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,5 +24,5 @@ requests==2.19.1
 scipy
 six==1.11.0
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 Werkzeug==0.14.1