diff --git a/src/server/file/index.ts b/src/server/file/index.ts
index 3e8eed2c3..22370ddd0 100644
--- a/src/server/file/index.ts
+++ b/src/server/file/index.ts
@@ -55,7 +55,7 @@ interface ISend {
 function thumbnail(data: stream.Readable, type: string, resize: number): ISend {
 	const readable: stream.Readable = (() => {
 		// 動画か画像であれば
-		if (/^(?:video|image)\/.*$/.test(type)) {
+		if (/^(?:video|image)\/.*$/.test(type) || type == 'application/xml') {
 			// 0フレーム目を送る
 			try {
 				return gm(data).selectFrame(0).stream();