diff --git a/requirements.txt b/requirements.txt
index 73cd4ef..f592b25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@
 #:test
 pytest == 8.3.5
 pytest-timeout == 2.3.1
-flake8 == 7.1.2
+flake8 == 7.1.2; python_version <= '3.8'
+flake8 == 7.2.0; python_version >= '3.9'