diff --git a/middleware.go b/middleware.go
index b955284..2aaa6c7 100644
--- a/middleware.go
+++ b/middleware.go
@@ -59,7 +59,7 @@ func CORSMiddleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
 		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
-		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Sort, sort, X-API-KEY, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
 		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, HEAD")
 
 		if c.Request.Method == "OPTIONS" {