diff --git a/gfx/progress.lua b/gfx/progress.lua
index 8040eac..d138680 100644
--- a/gfx/progress.lua
+++ b/gfx/progress.lua
@@ -1,4 +1,5 @@
 local Element = require("gfx.element")
+local Prop = require("gfx.prop")
 local Orientation = require("gfx.prop.orientation")
 
 local BlankElement = Element:new()
@@ -15,11 +16,11 @@ local function round(value, biasDown)
   return (((not biasDown) and decimal < 0.5) or ((not not biasDown) and decimal <= 0.5)) and math.floor(value) or math.ceil(value)
 end
 
-local Progress = Orientation.with(Element:new{
+local Progress = Prop.attach(Element:new{
   progress = 0.0,
   active = nil,
   inactive = nil
-})
+}, Orientation, Orientation.VERTICAL)
 
 function Progress:new(o)
   local obj = o or {}