diff --git a/app/src/protyle/render/highlightRender.ts b/app/src/protyle/render/highlightRender.ts
index cc2341bd6..e8fefff31 100644
--- a/app/src/protyle/render/highlightRender.ts
+++ b/app/src/protyle/render/highlightRender.ts
@@ -143,7 +143,7 @@ width: ${codeElement.clientWidth}px;
 white-space:${codeElement.style.whiteSpace};
 word-break:${codeElement.style.wordBreak};
 font-variant-ligatures:${codeElement.style.fontVariantLigatures};
-box-sizing: border-box;position: absolute;padding-top:0 !important;padding-bottom:0 !important;min-height:auto !important;`);
+max-height: none;box-sizing: border-box;position: absolute;padding-top:0 !important;padding-bottom:0 !important;min-height:auto !important;`);
     lineNumberTemp.setAttribute("contenteditable", "true");
     block.insertAdjacentElement("afterend", lineNumberTemp);