diff --git a/pyproject.toml b/pyproject.toml
index dd70d55..e20aa1d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ test = [
     "mypy >=1.0.0,<2.0.0",
     "flake8 >=6.0.0,<8.0.0",
     "ruff >=0.1.0,<1.0.0",
-    "isort >=5.11.0,<6.0.0",
+    "isort >=5.11.0,<7.0.0",
     "types-python-jose ==3.3.4.8"
 ]
 docs = [