diff --git a/bin/ace b/bin/ace
index 9dc2018..15ff0b8 100755
--- a/bin/ace
+++ b/bin/ace
@@ -72,7 +72,7 @@ end
 
 unless ARGV.include?("--no-generate")
   puts
-  Ace::Item.all_instances.each do |item|
+  Ace::Item.all_instances.uniq.each do |item|
     item.save!
   end
 end
diff --git a/lib/ace/filters/sass.rb b/lib/ace/filters/sass.rb
index be1e62a..65f2dd2 100644
--- a/lib/ace/filters/sass.rb
+++ b/lib/ace/filters/sass.rb
@@ -6,19 +6,22 @@ require "ace/filters"
 module Ace
   class SassFilter < Filter
     def call(item, content)
-      if item.output_path && item.output_path.end_with?(".scss")
-        item.output_path.sub!(/scss$/, "css")
+      if item.output_path && item.output_path.match(/\.s[ac]ss$/)
+        syntax = item.output_path.end_with?(".scss") ? :scss : :sass
+        item.output_path.sub!(/\.s[ac]ss$/, '')
+        output = nil
         begin
-          engine = Sass::Engine.new(content, {:syntax => :scss})
+          engine = Sass::Engine.new(content, syntax: syntax, filename: item.original_path)
           output = engine.render
         rescue Exception => e
           warn "~~ SassFilter exception: #{e}"
           abort
         end
+        #p caller: Kernel.caller
         return output
       else
         return content
       end
     end
   end
-end
\ No newline at end of file
+end