diff --git a/notebooks/requirements.txt b/notebooks/requirements.txt
index ca41eca..213aa89 100644
--- a/notebooks/requirements.txt
+++ b/notebooks/requirements.txt
@@ -87,7 +87,7 @@ tqdm==4.25.0
 traitlets==4.3.2
 Twisted==19.7.0
 ujson==1.35
-urllib3==1.23
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.0