diff --git a/examples/demo.c b/examples/demo.c
index 986ec355..a26114ab 100644
--- a/examples/demo.c
+++ b/examples/demo.c
@@ -9,10 +9,8 @@
 
 int main() {
 
-    /* Create a new workbook. */
-    lxw_workbook  *workbook  = new_workbook("hello_world.xlsx");
-
-    /* Add a worksheet. */
+    /* Create a new workbook and add a worksheet. */
+    lxw_workbook  *workbook  = new_workbook("demo.xlsx");
     lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
 
     /* Add a format. */
@@ -28,8 +26,8 @@ int main() {
     worksheet_write_string(worksheet, 1, 0, "World", format);
 
     /* Writer some numbers. */
-    worksheet_write_number(worksheet, 1, 0, 123,     NULL);
-    worksheet_write_number(worksheet, 1, 0, 123.456, NULL);
+    worksheet_write_number(worksheet, 2, 0, 123,     NULL);
+    worksheet_write_number(worksheet, 3, 0, 123.456, NULL);
 
     workbook_close(workbook);