diff --git a/requirements.txt b/requirements.txt
index f1a0945..eb39251 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -65,7 +65,7 @@ terminado==0.8.1
 testpath==0.3.1
 tornado==5.1
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 virtualenv==16.0.0
 virtualenv-clone==0.3.0
 virtualenvwrapper==4.8.2