diff --git a/pyproject.toml b/pyproject.toml
index 18a7121..7d523ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,3 +62,7 @@ asyncio_mode = "auto"
 [[tool.mypy.overrides]]
 module = "fontTools.*"
 ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "fontmake.*"
+ignore_missing_imports = true