diff --git a/lib/seed-fu/writer.rb b/lib/seed-fu/writer.rb
index 04e28fd..25f22e9 100644
--- a/lib/seed-fu/writer.rb
+++ b/lib/seed-fu/writer.rb
@@ -93,6 +93,7 @@ def write_to_io(io)
         yield(self)
         @io.write(seed_footer)
         @io.write(file_footer)
+        @io.close
       ensure
         @io, @count = nil, nil
       end