diff --git a/activity.go b/activity.go
index abd1940..1308a37 100644
--- a/activity.go
+++ b/activity.go
@@ -69,7 +69,7 @@ func (d *Client) SetActivity(act *Activity) (string, error) {
 
 	nonce := uuid.New().String()
 
-	_, _, err := validateRaw[Response[[]byte]](Heartbeat, "", "SET_ACTIVITY", nonce)(
+	_, _, err := validateRaw[Response[any]](Heartbeat, "", "SET_ACTIVITY", nonce)(
 		d, Heartbeat, Command[activityArgs]{
 			Arguments: activityArgs{
 				PID:      os.Getpid(),