diff --git a/render.go b/render.go
index 050a91a..6ffac89 100644
--- a/render.go
+++ b/render.go
@@ -19,7 +19,7 @@ import (
 const (
 	Size = 128
 	//Iterations = (1<<16 - 1) / 256
-	Iterations = (1<<16 - 1) / 32
+	Iterations = (1<<16 - 1) / 64
 )
 
 var (