diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9627576..d878ef3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,5 @@
 yapf
 pytest
+flake8<5 # https://github.com/tholo/pytest-flake8/issues/87
 pytest-flake8
 pytest-subtests