diff --git a/app/src/protyle/util/resize.ts b/app/src/protyle/util/resize.ts
index d46fedb0c..26dc558d3 100644
--- a/app/src/protyle/util/resize.ts
+++ b/app/src/protyle/util/resize.ts
@@ -20,7 +20,7 @@ export const resize = (protyle: IProtyle) => {
                 });
             }
             if (window.siyuan.config.editor.codeSyntaxHighlightLineNum) {
-                protyle.wysiwyg.element.querySelectorAll('.code-block [contenteditable="true"]').forEach((block: HTMLElement) => {
+                protyle.wysiwyg.element.querySelectorAll(".code-block .protyle-linenumber").forEach((block: HTMLElement) => {
                     lineNumberRender(block);
                 });
             }