diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..2c07333
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.11
diff --git a/pyproject.toml b/pyproject.toml
index 4765da8..e0cb38b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,12 +23,16 @@ packages = ["mcp_python"]
 [tool.pyright]
 include = ["mcp_python", "tests"]
 typeCheckingMode = "strict"
+venvPath = "."
+venv = ".venv"
 
-[tool.ruff]
+[tool.ruff.lint]
 select = ["E", "F", "I"]
 ignore = []
+
+[tool.ruff]
 line-length = 88
 target-version = "py38"
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "__init__.py" = ["F401"]