diff --git a/requirements.txt b/requirements.txt
index 87d71b96a7..6cbcbc59cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ cvxpy == 1.1.18
 pytest == 6.2.5 # For unit test
 pytest-xdist == 2.5.0 # For unit test
 mypy == 0.931 # For unit test
-flake8 == 4.0.1 # For unit test
+flake8 == 6.0.0 # For unit test
 sphinx == 4.3.2 # For sphinx documentation
 sphinx_rtd_theme == 1.0.0
 IPython == 7.31.0 # For sphinx documentation