diff --git a/global/codec.go b/global/codec.go
index 22df9fa..3d50e14 100644
--- a/global/codec.go
+++ b/global/codec.go
@@ -27,7 +27,10 @@ func EncoderSilk(data []byte) ([]byte, error) {
 		return nil, errors.New("no silk encoder")
 	}
 	h := md5.New()
-	h.Write(data)
+	_, err := h.Write(data)
+	if err != nil {
+		return nil, err
+	}
 	tempName := fmt.Sprintf("%x", h.Sum(nil))
 	if silkPath := path.Join("data/cache", tempName+".silk"); PathExists(silkPath) {
 		return ioutil.ReadFile(silkPath)
diff --git a/main.go b/main.go
index 03ce5ab..9d00052 100644
--- a/main.go
+++ b/main.go
@@ -98,7 +98,7 @@ func init() {
 }
 
 func main() {
-	
+
 	var byteKey []byte
 	var isFastStart = false
 	arg := os.Args
@@ -487,5 +487,5 @@ func restart(Args []string) {
 			Stdout: os.Stdout,
 		}
 	}
-	cmd.Start()
+	_ = cmd.Start()
 }
diff --git a/server/http.go b/server/http.go
index f3900f8..b3a35cb 100644
--- a/server/http.go
+++ b/server/http.go
@@ -123,7 +123,11 @@ func (c *httpClient) onBotPushEvent(m coolq.MSG) {
 		}
 		if c.secret != "" {
 			mac := hmac.New(sha1.New, []byte(c.secret))
-			mac.Write([]byte(m.ToJson()))
+			_, err := mac.Write([]byte(m.ToJson()))
+			if err != nil {
+				log.Error(err)
+				return nil
+			}
 			h["X-Signature"] = "sha1=" + hex.EncodeToString(mac.Sum(nil))
 		}
 		return h