diff --git a/cmd/gf/go.mod b/cmd/gf/go.mod
index 430fb4783..94ef8f12a 100644
--- a/cmd/gf/go.mod
+++ b/cmd/gf/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/gogf/gf/contrib/drivers/mssql/v2 v2.0.0-rc2
 	github.com/gogf/gf/contrib/drivers/pgsql/v2 v2.0.0-rc2
 	github.com/gogf/gf/contrib/drivers/sqlite/v2 v2.0.0-rc2
-	github.com/gogf/gf/v2 v2.0.0-rc
+	github.com/gogf/gf/v2 v2.0.0
 	github.com/olekukonko/tablewriter v0.0.5
 )
 
diff --git a/util/grand/grand.go b/util/grand/grand.go
index 77478cee4..34554a2f5 100644
--- a/util/grand/grand.go
+++ b/util/grand/grand.go
@@ -60,16 +60,12 @@ func N(min, max int) int {
 		return min
 	}
 	if min >= 0 {
-		// Because Intn dose not support negative number,
-		// so we should first shift the value to left,
-		// then call Intn to produce the random number,
-		// and finally shift the result back to right.
-		return Intn(max-(min-0)+1) + (min - 0)
+		return Intn(max-min+1) + min
 	}
 	if min < 0 {
-		// Because Intn dose not support negative number,
+		// As `Intn` dose not support negative number,
 		// so we should first shift the value to right,
-		// then call Intn to produce the random number,
+		// then call `Intn` to produce the random number,
 		// and finally shift the result back to left.
 		return Intn(max+(0-min)+1) - (0 - min)
 	}