diff --git a/docs/requirements.txt b/docs/requirements.txt
index e07c41c..e867bd7 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -77,7 +77,7 @@ tornado==5.1.1
 tqdm==4.31.1
 traitlets==4.3.2
 twine==1.13.0
-urllib3==1.25.2
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.2