diff --git a/example/limit/period/periodlimit.go b/example/limit/period/periodlimit.go
index aedcabfa..f5295c9a 100644
--- a/example/limit/period/periodlimit.go
+++ b/example/limit/period/periodlimit.go
@@ -29,7 +29,7 @@ func main() {
 
 	store := redis.NewRedis(*rdx, *rdxType, *rdxPass)
 	fmt.Println(store.Ping())
-	lmt := limit.NewPeriodLimit(seconds+1, 5, store, *rdxKey)
+	lmt := limit.NewPeriodLimit(seconds, 5, store, *rdxKey)
 	timer := time.NewTimer(time.Second * seconds)
 	quit := make(chan struct{})
 	defer timer.Stop()
@@ -41,8 +41,8 @@ func main() {
 	var allowed, denied int32
 	var wait sync.WaitGroup
 	for i := 0; i < *threads; i++ {
-		wait.Add(1)
 		i := i
+		wait.Add(1)
 		go func() {
 			for {
 				select {
diff --git a/tools/goctl/api/gogen/gen.go b/tools/goctl/api/gogen/gen.go
index ff3386cc..c28b23b6 100644
--- a/tools/goctl/api/gogen/gen.go
+++ b/tools/goctl/api/gogen/gen.go
@@ -12,13 +12,12 @@ import (
 	"time"
 
 	"github.com/logrusorgru/aurora"
-	"github.com/urfave/cli"
-
 	"github.com/tal-tech/go-zero/core/logx"
 	apiformat "github.com/tal-tech/go-zero/tools/goctl/api/format"
 	"github.com/tal-tech/go-zero/tools/goctl/api/parser"
 	apiutil "github.com/tal-tech/go-zero/tools/goctl/api/util"
 	"github.com/tal-tech/go-zero/tools/goctl/util"
+	"github.com/urfave/cli"
 )
 
 const tmpFile = "%s-%d"