diff --git a/requirements_dev.txt b/requirements_dev.txt
index eb17b0a..432be2c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -68,7 +68,7 @@ tox==3.0.0
 tqdm==4.23.1
 twine==1.11.0
 typed-ast==1.1.0
-urllib3==1.22
+urllib3==1.26.5
 virtualenv==15.2.0
 watchdog==0.8.3
 websocket-client==0.48.0