diff --git a/pyproject.toml b/pyproject.toml
index acc9dae..58f3157 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dev = [
     "attribution==1.6.2",
     "black==23.3.0",
     "coverage[toml]==7.2.3",
-    "flake8==6.0.0",
+    "flake8==5.0.4",
     "flake8-bugbear==23.3.23; python_version >= '3.8'",
     "flit==3.7.1",
     "mypy==1.2.0",