diff --git a/src/file.ts b/src/file.ts
index 7848925..46e5b67 100644
--- a/src/file.ts
+++ b/src/file.ts
@@ -12,7 +12,7 @@ const getApiUrl = (id: number, type: FileType, index: number): string => {
 };
 
 const getApiAuth = (id: number, type: FileType, index: number): string => {
-    const suffix = "et";
+    const suffix = "%%%@";
     const code = `${id}${type}${index}${suffix}`;
     return md5(code).slice(0, 4);
 };