diff --git a/dev_requirements.txt b/dev_requirements.txt
index 8285b0456f..8ffb1e944f 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -15,4 +15,5 @@ pytest-cov>=4.0.0
 vulture>=2.3.0
 ujson>=4.2.0
 wheel>=0.30.0
+urllib3<2
 uvloop