upgrade urllib3
diff --git a/requirements.txt b/requirements.txt
index 0660a1a..3bfedc0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -89,7 +89,7 @@
 traitlets==4.3.2          # via ipython
 translationstring==1.3    # via colander
 turbogears2==2.3.12       # via -r requirements.in
-urllib3==1.25.8           # via requests
+urllib3==1.25.10          # via requests
 waitress==1.4.3           # via webtest
 wcwidth==0.1.7            # via prompt-toolkit
 webencodings==0.5.1       # via bleach, html5lib