diff --git a/render.go b/render.go
index ceebd25..f84db1e 100644
--- a/render.go
+++ b/render.go
@@ -22,7 +22,7 @@ import (
 )
 
 const (
-	Size = 128
+	Size = 512
 	//Iterations = (1<<16 - 1) / 256
 	Iterations = (1<<16 - 1) / 256
 )