diff --git a/common.go b/common.go
index eb251f0..2d27e92 100644
--- a/common.go
+++ b/common.go
@@ -243,8 +243,8 @@ func (c *common) GetString(key interface{}) (string, error) {
 
 func (c *common) Set(key interface{}, value interface{}) {
 	segmentIndex := util.Hash.GetHashIDMod(key, c.segment)
-	c.lock.Lock()
-	defer c.lock.RUnlock()
+	c.Lock()
+	defer c.Unlock()
 	if c.dataTableType == normalDataTableType {
 		c.normalDataTable[segmentIndex][key] = value
 	} else {