diff --git a/requirements_dev.in b/requirements_dev.in
index 783dd20..aeb9f25 100644
--- a/requirements_dev.in
+++ b/requirements_dev.in
@@ -2,7 +2,7 @@
 -r ./requirements.txt
 
 # Test Libraries
-flake8
+flake8<4  # see https://github.com/tholo/pytest-flake8/issues/81
 tox
 model_bakery
 isort