diff --git a/requirements-dev.txt b/requirements-dev.txt
index 77fedb9716..b0615ecbd9 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,3 +5,5 @@ pytest-httpbin==2.1.0
 httpbin~=0.10.0
 trustme
 wheel
+tox
+flake8
\ No newline at end of file