diff --git a/pyproject.toml b/pyproject.toml
index 8e7600d72..7814ae266 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -141,6 +141,7 @@ exclude = ["**/node_modules", "**/__pycache__", ".venv", ".git", "dist"]
 
 [tool.ty.environment]
 python-version = "3.10"
+extra-paths = ["fastmcp_slim"]
 
 [tool.ty.rules]
 division-by-zero = "warn"