diff --git a/requirements-dev.txt b/requirements-dev.txt
index a937367..7f1a7da 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -35,6 +35,6 @@ starlette==0.13.6
 toml==0.10.2
 typed-ast==1.4.2
 typing-extensions==3.7.4.3
-urllib3==1.26.3
+urllib3==1.26.4
 uvicorn==0.12.3
 wrapt==1.12.1