diff --git a/convert.lua b/convert.lua
index 638928b..9371e27 100644
--- a/convert.lua
+++ b/convert.lua
@@ -18,23 +18,10 @@ local layer_list = {
   'VolumetricAveragePooling',
 }
 
--- similar to nn.Module.apply
--- goes over a net and recursively replaces modules
--- using callback function
-local function replace(self, callback)
-  local out = callback(self)
-  if self.modules then
-    for i, module in ipairs(self.modules) do
-      self.modules[i] = replace(module, callback)
-    end
-  end
-  return out
-end
-
 -- goes over a given net and converts all layers to dst backend
 -- for example: net = cudnn.convert(net, cudnn)
 function cudnn.convert(net, dst)
-  return replace(net, function(x)
+  return net:replace(function(x)
     local y = 0
     local src = dst == nn and cudnn or nn
     local src_prefix = src == nn and 'nn.' or 'cudnn.'