diff --git a/pyproject.toml b/pyproject.toml
index f97ae595..9a211b66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ mypy = {version = "^1.9.0", markers = "platform_python_implementation == 'CPytho
 pytest = "^8.0.2"
 ipdb = "^0.13.9"
 black = ">=24.2,<26.0"
-isort = "^5.9.3"
+isort = ">=5.9.3,<8.0.0"
 flake8 = "^5.0.4"
 bandit = "^1.7.4"
 coverage = "^7.1"