diff --git a/pyproject.toml b/pyproject.toml
index ccf8a355..d0e96540 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ dev = [
     "pytest-cov>=4,<8",
     "rich>=13,<16",
     "thermo>=0.2",
-    "ruff>=0.0.210,<0.16.5",
+    "ruff>=0.0.210,<0.16.9",
     "seaborn>=0.12,<0.14",
     "types-setuptools>=65,<85",
 ]