diff --git a/pyproject.toml b/pyproject.toml
index c2b131d..2f699b3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["pre-commit", "pytest", "pytest-cov", "pytest-mock", "ruff==0.15.5"]
+dev = ["pre-commit", "pytest", "pytest-cov", "pytest-mock", "ruff==0.15.6"]
 doc = ["sphinx", "pydata-sphinx-theme", "myst-parser", "autodoc_pydantic"]
 mcp = ["mcp[cli]>=1.2.0", "pyyaml"]