diff --git a/shrine/lib/app.dart b/shrine/lib/app.dart
index c9932b550..95e72c418 100644
--- a/shrine/lib/app.dart
+++ b/shrine/lib/app.dart
@@ -15,10 +15,10 @@
 import 'package:flutter/material.dart';
 
 import 'backdrop.dart';
+import 'category_menu_page.dart';
 import 'colors.dart';
 import 'home.dart';
 import 'login.dart';
-import 'category_menu_page.dart';
 import 'model/product.dart';
 import 'supplemental/cut_corners_border.dart';
 
diff --git a/shrine/lib/backdrop.dart b/shrine/lib/backdrop.dart
index 8eabfe291..fc3bbbe8c 100644
--- a/shrine/lib/backdrop.dart
+++ b/shrine/lib/backdrop.dart
@@ -19,7 +19,7 @@ import 'login.dart';
 import 'model/product.dart';
 import 'shopping_cart.dart';
 
-double _kFlingVelocity = 2.0;
+const double _kFlingVelocity = 2.0;
 
 class _FrontLayer extends StatelessWidget {
   const _FrontLayer({