diff --git a/main.go b/main.go
index 661d02f..c112d52 100644
--- a/main.go
+++ b/main.go
@@ -7,7 +7,7 @@ import (
 	"runtime"
 )
 
-var algo = flag.String("a", "sha1", "algorithm to use")
+var algo = flag.String("a", "sha256", "algorithm to use")
 var mode = flag.Bool("c", false, "check")
 var ngo = flag.Int("n", runtime.NumCPU(), "number of goroutines")