diff --git a/content/document.ts b/content/document.ts
index 3bcf5a5fe2ec..87bde22334f4 100644
--- a/content/document.ts
+++ b/content/document.ts
@@ -146,7 +146,9 @@ export function saveFile(
   const folderPath = path.dirname(filePath);
   fs.mkdirSync(folderPath, { recursive: true });
 
-  const combined = `---\n${yaml.dump(saveMetadata)}---\n\n${rawBody.trim()}\n`;
+  const combined = `---\n${yaml.dump(saveMetadata, {
+    quotingType: '"',
+  })}---\n\n${rawBody.trim()}\n`;
   fs.writeFileSync(filePath, combined);
 }