diff --git a/setup.cfg b/setup.cfg
index 26c0d092..f75bf179 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,7 +15,10 @@ warn_unreachable = True
 strict_equality = True
 disallow_untyped_defs = True
 disallow_untyped_calls = True
-files = tuf/api/, tuf/exceptions.py
+files =
+  tuf/api/,
+  tuf/ngclient,
+  tuf/exceptions.py
 
 [mypy-securesystemslib.*]
 ignore_missing_imports = True