diff --git a/setup.py b/setup.py
index 59d0e64..eb8dfe0 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 
 tests_require = [
     'pytest',
-    'flake8 < 4',
+    'flake8',
     'pytest-flake8',
     'pytest-cram == 0.2.2',
 ]