diff --git a/test-requirements.txt b/test-requirements.txt
index 6de052a..55036d4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
-flake8==3.8.4
+flake8==4.0.1
 pytest==6.2.4
 pytest-asyncio==0.14.0
 pytest-cov==2.10.1