diff --git a/requirements.txt b/requirements.txt
index 5e0e5c9027..4794a4a14b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,3 +29,4 @@ cherrypy
 ws4py
 routes
 jsonpath-rw
+urllib3<=1.25.3  # https://github.com/urllib3/urllib3/pull/1684