diff --git a/lib/outlook/html_preparations/html_preparation.ex b/lib/outlook/html_preparations/html_preparation.ex
index dbe3810..1536ba1 100644
--- a/lib/outlook/html_preparations/html_preparation.ex
+++ b/lib/outlook/html_preparations/html_preparation.ex
@@ -43,7 +43,7 @@ defmodule Outlook.HtmlPreparations.HtmlPreparation do
       } | floki_to_internal(rest) ]
   end
 
-  def floki_to_internal([ ]), do: ( [ ] )
+  def floki_to_internal([]), do: []
 
 
   def set_sibling_with([ %{type: :element} = node | rest ]) do
@@ -61,7 +61,7 @@ defmodule Outlook.HtmlPreparations.HtmlPreparation do
     [ %InternalNode{ node | eph: %{sibling_with: sib_with} } | set_sibling_with(rest) ]
   end
 
-  def set_sibling_with([ ]), do: ( [ ] )
+  def set_sibling_with([]), do: []
 
 
   def strip_whitespace_textnodes [ %{type: :text} = node | rest] do