diff --git a/src/ui/flutter_app/.gitignore b/src/ui/flutter_app/.gitignore
index 4b7a1477..aefa45e8 100644
--- a/src/ui/flutter_app/.gitignore
+++ b/src/ui/flutter_app/.gitignore
@@ -41,3 +41,6 @@ lib/generated_plugin_registrant.dart
 
 # Exceptions to above rules.
 !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+
+# Sanmill Settings
+sanmill_settings.json