diff --git a/bin/dither/dither.rb b/bin/dither/dither.rb
index 7e35e1f..c71a049 100644
--- a/bin/dither/dither.rb
+++ b/bin/dither/dither.rb
@@ -29,6 +29,7 @@ get "/*" do |path|
   convert.stdin
   convert.background("white")
   convert.layers("flatten")
+  convert.strip
 
   if geometry
     if geometry.match?(/^\d+x\d+$/)