diff --git a/pyproject.toml b/pyproject.toml
index b76a930..5d9dc1d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ requires-python = ">=3.11"
 dependencies = []
 
 [project.optional-dependencies]
-mcp = ["mcp[cli]>=1.0"]
+mcp = ["mcp[cli]>=1.27.1"]
 dev = ["pytest>=8.0", "pytest-asyncio>=0.24"]
 
 [project.scripts]