diff --git a/mypy.ini b/mypy.ini
index 8f1bc91ef..449262795 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -17,5 +17,8 @@ check_untyped_defs = True
 [mypy-certbot_dns_luadns.*]
 check_untyped_defs = True
 
+[mypy-certbot_dns_nsone.*]
+check_untyped_defs = True
+
 [mypy-certbot_dns_rfc2136.*]
 check_untyped_defs = True