diff --git a/pyproject.toml b/pyproject.toml
index e641bef..c214f21 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ requires-python = ">=3.11"
 dependencies = ["pyyaml>=6.0.3", "jsonschema>=4.0"]
 
 [project.optional-dependencies]
-dev = ["pytest>=9.1.1", "hypothesis>=6.155.6", "mypy>=2.1.0", "mcp>=1.28.0"]
+dev = ["pytest>=9.1.1", "hypothesis>=6.156.6", "mypy>=2.1.0", "mcp>=1.28.0"]
 mcp = ["mcp>=1.28.0"]
 # Install only the router + ontology layer (no conductor OS, no jsonschema):
 #   pip install conductor[router-only]