diff --git a/src/HttpServer/logic/logic.go b/src/HttpServer/logic/logic.go
index 785c3ae..64b0873 100644
--- a/src/HttpServer/logic/logic.go
+++ b/src/HttpServer/logic/logic.go
@@ -10,8 +10,11 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"sync"
 )
 
+var llock sync.Mutex
+
 func HandlerQueryguaninfo(w http.ResponseWriter, data string, uuid int) {
 	SetHeader(w)
 	var resp QueryguaninfoResp
@@ -725,6 +728,8 @@ func HandlerQuerytaskinfo(w http.ResponseWriter, data string, uuid int) {
 
 func HandlerUpdatetaskandachieve(w http.ResponseWriter, data string, uuid int) {
 	SetHeader(w)
+	llock.Lock()
+	defer llock.Unlock()
 	var resp UpdatetaskResp
 	resp.Code = 0
 	var rdata UpdatetaskReq
--
libgit2 0.21.0