diff -r cbace196bdbf -r 69fadd1aded2 www/includes/db_inventory_yeasts.php
--- a/www/includes/db_inventory_yeasts.php	Mon Feb 25 22:53:41 2019 +0100
+++ b/www/includes/db_inventory_yeasts.php	Tue Feb 26 16:18:16 2019 +0100
@@ -100,6 +100,7 @@
 			'cells' => floatval($row['cells']) / 1000000000.0
 		);
 	}
+	header("Content-type: application/json");
 	echo json_encode($yeasts);
 }
 ?>