diff --git a/src/import.ts b/src/import.ts
index c211814..c65c01f 100644
--- a/src/import.ts
+++ b/src/import.ts
@@ -76,6 +76,20 @@ export default class Import extends Plugin {
 							scriptElement.textContent = latex;
 							mathmlElement.replaceWith(scriptElement);
 						});
+						// font-family for <span> concat with , serif
+						const spans = body.querySelectorAll("span");
+						spans.forEach(span => {
+							span.style.fontFamily += ", serif";
+							// check if it's <p> tag has font-size attribute, then apply to <span> tag
+							const p = span.parentElement;
+							if (p && p.tagName === "P") {
+								const fontSize = p.style.fontSize;
+								if (fontSize) {
+									span.style.fontSize = fontSize;
+								}
+							}
+						});
+						console.log("Converted HTML:", body.innerHTML);
 						this.editor.setData(body.innerHTML);
 					} catch (error) {
 						console.error("Error uploading file:", error);