Add vignettes
diff --git a/R/add_header_above.R b/R/add_header_above.R
index 5c9531b..5a3c31a 100644
--- a/R/add_header_above.R
+++ b/R/add_header_above.R
@@ -53,7 +53,7 @@
   out <- structure(as.character(kable_xml), format = "html",
                    class = "knitr_kable")
   attr(out, "original_kable_meta") <- table_info
-  return()
+  return(out)
 }
 
 standardize_header_input <- function(header) {