diff --git a/module/shop/shop_medal.py b/module/shop/shop_medal.py
index 05d6bbeda..0e8c030a0 100644
--- a/module/shop/shop_medal.py
+++ b/module/shop/shop_medal.py
@@ -28,7 +28,7 @@ class ShopScroll(Scroll):
             self.area[2] + delta_x,
             self.area[3]
         )
-        image = main.image_crop(area, copy=False).astype(np.float)
+        image = main.image_crop(area, copy=False).astype(np.float32)
         baseline_color = np.mean(image[:, [0, -1], :], axis=1)
         masked_color = image[:, image.shape[1] // 2, :]
         background_mask = background_transparency * np.array(self.color) + (1 - background_transparency) * baseline_color