diff --git a/src/check.ts b/src/check.ts
index 9a9d509..1a82570 100644
--- a/src/check.ts
+++ b/src/check.ts
@@ -7,7 +7,7 @@ for (const feed of fs
   try {
     const xml: any = xmlbuilder2.convert(
       fs.readFileSync(`static/feeds/${feed}`, "utf8"),
-      { format: "object", wellFormed: true }
+      { format: "object" }
     );
     if (xml?.feed?.updated === undefined)
       throw new Error("Can’t find xml.feed.updated");
diff --git a/src/index.tsx b/src/index.tsx
index f7a32d7..b98ecfa 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -298,7 +298,6 @@ function renderHTML(component: React.ReactElement): string {
 function renderXML(xml: object): string {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "xml",
-    wellFormed: true,
     noDoubleEncoding: true,
     prettyPrint: true
   });
@@ -307,7 +306,6 @@ function renderXML(xml: object): string {
 function parseXML(xml: string): any {
   return xmlbuilder2.convert({ invalidCharReplacement: "" }, xml, {
     format: "object",
-    wellFormed: true,
     noDoubleEncoding: true
   });
 }