diff --git a/core/templates/core/markdown_textarea.jinja b/core/templates/core/markdown_textarea.jinja
index 5efaf0d3f72920fb5090c2d17ce03a7028767013..285b7f24a8e37fc59234126032c3e46165dd9a0e 100644
--- a/core/templates/core/markdown_textarea.jinja
+++ b/core/templates/core/markdown_textarea.jinja
@@ -54,6 +54,7 @@
 			spellChecker: false,
 			previewRender: function(plainText, preview){ // Async method
 				customMarkdownParser(plainText, preview);
+				return preview.innerHTML;
 			}
 		});