diff --git a/pyproject.toml b/pyproject.toml
index ee2f67f..cf320d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ all = ["zeep", "ipython", "orjson"]
 
 [tool.poetry.dev-dependencies]
 black = "~22"
-flake8 = "~4"
+flake8 = "~5"
 isort = "~5"
 mkdocs-material = "~8"
 mypy = "~1"