diff --git a/api/service/syncing/downloader/client.go b/api/service/syncing/downloader/client.go
index 1c4573e9c..d17c5e24c 100644
--- a/api/service/syncing/downloader/client.go
+++ b/api/service/syncing/downloader/client.go
@@ -110,7 +110,7 @@ func (client *Client) PushNewBlock(selfPeerHash [20]byte, blockHash []byte, time
 
 // GetBlockChainHeight gets the blockheight from peer
 func (client *Client) GetBlockChainHeight() *pb.DownloaderResponse {
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCKHEIGHT}
 	response, err := client.dlClient.Query(ctx, request)
diff --git a/api/service/syncing/syncing.go b/api/service/syncing/syncing.go
index ad10ffb02..3c542362c 100644
--- a/api/service/syncing/syncing.go
+++ b/api/service/syncing/syncing.go
@@ -74,7 +74,6 @@ type StateSync struct {
 	selfPeerHash       [20]byte // hash of ip and address combination
 	peerNumber         int
 	activePeerNumber   int
-	currentHeight      uint64 // current height of local blockchain
 	commonBlocks       map[int]*types.Block
 	lastMileBlocks     []*types.Block // last mile blocks to catch up with the consensus
 	syncConfig         *SyncConfig
@@ -449,7 +448,6 @@ func (ss *StateSync) updateBlockAndStatus(block *types.Block, bc *core.BlockChai
 		return false
 	}
 	ss.syncMux.Lock()
-	ss.currentHeight = bc.CurrentBlock().NumberU64()
 	worker.UpdateCurrent()
 	ss.syncMux.Unlock()
 	utils.GetLogInstance().Info("[SYNC] new block added to blockchain", "blockHeight", bc.CurrentBlock().NumberU64(), "blockHex", bc.CurrentBlock().Hash().Hex())
@@ -584,15 +582,17 @@ func (ss *StateSync) getMaxPeerHeight() uint64 {
 }
 
 // IsOutOfSync checks whether the node is out of sync from other peers
-func (ss *StateSync) IsOutOfSync() bool {
+func (ss *StateSync) IsOutOfSync(bc *core.BlockChain) bool {
 	otherHeight := ss.getMaxPeerHeight()
-	return ss.currentHeight+inSyncThreshold < otherHeight
+	currentHeight := bc.CurrentBlock().NumberU64()
+	utils.GetLogInstance().Debug("[SYNC] IsOutOfSync", "otherHeight", otherHeight, "myHeight", currentHeight)
+	return currentHeight+inSyncThreshold < otherHeight
 }
 
 // SyncLoop will keep syncing with peers until catches up
 func (ss *StateSync) SyncLoop(bc *core.BlockChain, worker *worker.Worker, willJoinConsensus bool) {
 	for {
-		if !ss.IsOutOfSync() {
+		if !ss.IsOutOfSync(bc) {
 			utils.GetLogInstance().Info("[SYNC] Node is now IN SYNC!")
 			return
 		}
diff --git a/node/node_syncing.go b/node/node_syncing.go
index 4af51f323..5bcf694d7 100644
--- a/node/node_syncing.go
+++ b/node/node_syncing.go
@@ -78,7 +78,7 @@ SyncingLoop:
 					continue SyncingLoop
 				}
 			}
-			if node.stateSync.IsOutOfSync() {
+			if node.stateSync.IsOutOfSync(bc) {
 				utils.GetLogInstance().Debug("[SYNC] out of sync, doing syncing")
 				node.stateMutex.Lock()
 				node.State = NodeNotInSync