diff --git a/docz/static/electron/index.js b/docz/static/electron/index.js
index 1011c16..bf25d87 100644
--- a/docz/static/electron/index.js
+++ b/docz/static/electron/index.js
@@ -45,10 +45,9 @@ function renderWorkbookToTables(wb) {
   const sheetNames = wb.SheetNames;
   sheetNames.forEach((sheetName) => {
     const sheet = wb.Sheets[sheetName];
-    const sheetname = sheetName;
     const table = XLSX.utils.sheet_to_html(sheet);
     htmlout.innerHTML += `<details class="sheetjs-sheet-container">
-    <summary class="sheetjs-sheet-name">${sheetname}</summary>
+    <summary class="sheetjs-sheet-name">${sheetName}</summary>
     <div class="sheetjs-tab-content">${table}</div>
   </details>`;
   });