diff --git a/requirements_test.txt b/requirements_test.txt
index 2e9d5b1..2e2fecf 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 mock
 coverage==7.0.5
-flake8==5.0.4
+flake8==6.1.0
 phulpy==1.0.10
 pytest==7.4.2
 pytest-cov==4.1.0