diff --git a/def.go b/def.go
index 180636d..e055f52 100644
--- a/def.go
+++ b/def.go
@@ -51,9 +51,9 @@ type Packet struct {
 
 type PacketAdminJoin struct {
 	Packet
-	Password   string
-	AppName    string
-	AppVersion string
+	Password   []byte
+	AppName    []byte
+	AppVersion []byte
 }
 
 func (p *PacketAdminJoin) Bytes() []byte {