diff --git a/pyproject.toml b/pyproject.toml
index 9fe7adb..fd53e50 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ dev = [
     "black (>=26.3.1,<26.4.0)",
     "build (>=1.4.4,<1.5.0)",
     "coverage>=7.13.5",
-    "isort (>=8.0.1,<8.1.0)",
+    "isort (>=9.0.1,<9.1.0)",
     "pre-commit (>=4.6.0,<4.7.0)",
     "pytest (>=9.0.0,<9.1.0)",
     "pytest-bdd (>=8.1.0, <8.2.0)",