diff --git a/core/hy/resolver.go b/core/hy/resolver.go
index cc5edd9..8da3ea8 100644
--- a/core/hy/resolver.go
+++ b/core/hy/resolver.go
@@ -1,20 +1,9 @@
 package hy
 
-import (
-	"crypto/tls"
-	"errors"
-	"net"
-	"net/url"
-	"strings"
-
-	"github.com/Yuzuki616/hysteria/core/utils"
-	rdns "github.com/folbricht/routedns"
-)
-
-var errInvalidSyntax = errors.New("invalid syntax")
+//var errInvalidSyntax = errors.New("invalid syntax")
 
 func setResolver(dns string) error {
-	if net.ParseIP(dns) != nil {
+	/*if net.ParseIP(dns) != nil {
 		// Just an IP address, treat as UDP 53
 		dns = "udp://" + net.JoinHostPort(dns, "53")
 	}
@@ -118,6 +107,6 @@ func setResolver(dns string) error {
 		return errInvalidSyntax
 	}
 	cache := rdns.NewCache("cache", r, rdns.CacheOptions{})
-	net.DefaultResolver = rdns.NewNetResolver(cache)
+	net.DefaultResolver = rdns.NewNetResolver(cache)*/
 	return nil
 }
diff --git a/node/task.go b/node/task.go
index 8940dd1..d9ce94c 100644
--- a/node/task.go
+++ b/node/task.go
@@ -41,9 +41,9 @@ func (c *Controller) startTasks(node *panel.NodeInfo) {
 	}
 	if c.LimitConfig.EnableDynamicSpeedLimit {
 		c.traffic = make(map[string]int64)
-		c.renewCertPeriodic = &task.Task{
-			Interval: time.Duration(c.LimitConfig.DynamicSpeedLimitConfig.Periodic) * time.Minute,
-			Execute:  c.reportUserTrafficTask,
+		c.dynamicSpeedLimitPeriodic = &task.Task{
+			Interval: time.Duration(c.LimitConfig.DynamicSpeedLimitConfig.Periodic) * time.Second,
+			Execute:  c.SpeedChecker,
 		}
 	}
 }
@@ -204,7 +204,7 @@ func (c *Controller) nodeInfoMonitor() (err error) {
 	return nil
 }
 
-func (c *Controller) SpeedChecker() {
+func (c *Controller) SpeedChecker() error {
 	for u, t := range c.traffic {
 		if t >= c.LimitConfig.DynamicSpeedLimitConfig.Traffic {
 			err := c.limiter.UpdateDynamicSpeedLimit(c.tag, u,
@@ -214,4 +214,5 @@ func (c *Controller) SpeedChecker() {
 			delete(c.traffic, u)
 		}
 	}
+	return nil
 }