diff --git a/index.html b/index.html
index 9fe5010..c95a841 100644
--- a/index.html
+++ b/index.html
@@ -78,7 +78,7 @@ var process_wb = (function() {
 	var to_json = function to_json(workbook) {
 		var result = {};
 		workbook.SheetNames.forEach(function(sheetName) {
-			var roa = X.utils.sheet_to_json(workbook.Sheets[sheetName]);
+			var roa = X.utils.sheet_to_json(workbook.Sheets[sheetName], {header:1});
 			if(roa.length) result[sheetName] = roa;
 		});
 		return JSON.stringify(result, 2, 2);