diff --git a/requirements-dev.txt b/requirements-dev.txt
index 1d286529..904b2247 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -13,5 +13,5 @@ python-dateutil==2.7.5
 requests==2.20.1
 six==1.11.0
 sortedcontainers==2.1.0
-urllib3==1.24.2
+urllib3==1.26.5
 websocket-client==0.54.0