diff --git a/pyproject.toml b/pyproject.toml
index 842305d6..c0bbfc74 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ dev = [
     "pytest-cov>=4,<6",
     "rich>=13,<15",
     "thermo>=0.2",
-    "ruff>=0.0.210,<0.9.3",
+    "ruff>=0.0.210,<0.15.21",
     "seaborn>=0.12,<0.14",
     "types-setuptools>=65,<76",
 ]