diff --git a/pyproject.toml b/pyproject.toml
index 9b4c02e..7fe11d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ greenlet = "^3.0.3"
 alembic = "^1.13.2"
 pylint = "^3.2.6"
 mypy = "^1.11.1"
-isort = "^5.13.2"
+isort = ">=5.13.2,<7.0.0"
 black = "^24.4.2"
 commitizen = "^3.28.0"
 pre-commit = "^3.5.0"