diff --git a/pyproject.toml b/pyproject.toml
index a6810f2..51cb262 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ serde = "^0.9.0"
 [tool.poetry.group.dev.dependencies]
 black = "^26.1.0"
 fire = "^0.7.1"
-isort = "^7.0.0"
+isort = ">=7,<9"
 mypy = "^1.19.0"
 pip-audit = "^2.10.0"
 pytest = "^9.0.2"