diff --git a/requirements.txt b/requirements.txt
index ecbd774..647ae1b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -99,7 +99,7 @@ testpath==0.4.4
 toolz==0.10.0
 tornado==6.0.3
 traitlets==4.3.3
-urllib3==1.25.7
+urllib3==1.26.5
 wcwidth==0.1.8
 webencodings==0.5.1
 xarray==0.15.0