diff --git a/requirements.txt b/requirements.txt
index 6b6aa22..2802412 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ six==1.11.0
 statsmodels==0.9.0
 traitlets==4.3.2
 translationstring==1.3
-urllib3==1.23
+urllib3==1.26.5
 venusian==1.1.0
 WebOb==1.8.2
 Werkzeug==0.14.1