diff --git a/src/servers/allnet/middleware/dfi.ts b/src/servers/allnet/middleware/dfi.ts
index 3da71aa..a500d02 100644
--- a/src/servers/allnet/middleware/dfi.ts
+++ b/src/servers/allnet/middleware/dfi.ts
@@ -47,6 +47,7 @@ export const DFIRequestResponse: (mustUseDfi: boolean) => RequestHandler = (must
 		req.safeBody = req.body as Record<string, unknown>;
 
 		const transformers: Array<NodeJS.ReadWriteStream> = [
+			iconv.decodeStream("utf-8"),
 			iconv.encodeStream(req.body.encode ?? "EUC-JP"),
 		];