diff --git a/pyproject.toml b/pyproject.toml
index c0706ac..57d189c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ coverage = "7.2.7"
 flake8 = "5.0.4" # last version supporting Python 3.7
 flake8-annotations = "2.9.1" # last version supporting Python 3.7
 flake8-bugbear = "22.12.6" # last version supporting Python 3.7
-flake8-isort = "4.2.0"
+flake8-isort = "6.0.0"
 isort = "5.11.5" # last version supporting Python 3.7
 mypy = "1.4.1"
 tox = "3.28.0"