diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 2a60448a3ea9da64db55062d2e1042db594d77f6..41011056688f51e4ec1227ab4c556cd6b4448b38 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -213,8 +213,8 @@ TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass,
     tscDebug("%p DB connection is opening, rpcObj: %p, dnodeConn:%p", pObj, pObj->pRpcObj, pObj->pRpcObj->pDnodeConn);
     taos_free_result(pSql);
   
-    // version compare only requires the first 3 segments of the version string
-    int code = taosCheckVersion(version, taos_get_server_info(pObj), 3);
+    // version compare only requires the first 1 segments of the version string
+    int code = taosCheckVersion(version, taos_get_server_info(pObj), 1);
     if (code != 0) {
       terrno = code;
       taos_close(pObj);
diff --git a/src/mnode/src/mnodeShow.c b/src/mnode/src/mnodeShow.c
index 960987e7ad3b570548d9f8eb93a64ed963a5956b..fd0eeea7eea71de982bb4a2e8f73732404e219e9 100644
--- a/src/mnode/src/mnodeShow.c
+++ b/src/mnode/src/mnodeShow.c
@@ -243,7 +243,7 @@ static int32_t mnodeProcessHeartBeatMsg(SMnodeMsg *pMsg) {
   }
 
   SHeartBeatMsg *pHBMsg = pMsg->rpcMsg.pCont;
-  if (taosCheckVersion(pHBMsg->clientVer, version, 3) != TSDB_CODE_SUCCESS) {
+  if (taosCheckVersion(pHBMsg->clientVer, version, 1) != TSDB_CODE_SUCCESS) {
     rpcFreeCont(pRsp);
     return TSDB_CODE_TSC_INVALID_VERSION;  // todo change the error code
   }
@@ -307,7 +307,7 @@ static int32_t mnodeProcessConnectMsg(SMnodeMsg *pMsg) {
     goto connect_over;
   }
 
-  code = taosCheckVersion(pConnectMsg->clientVersion, version, 3);
+  code = taosCheckVersion(pConnectMsg->clientVersion, version, 1);
   if (code != TSDB_CODE_SUCCESS) {
     goto connect_over;
   }
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index caa199f2ab2a463baaa8c222bec93fa826f8d145..db2c4b593647a16ac9f5d74916e7654abdc87b10 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -7945,7 +7945,7 @@ static int32_t deserializeColFilterInfo(SColumnFilterInfo* pColFilters, int16_t
 int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SQueryParam* param) {
   int32_t code = TSDB_CODE_SUCCESS;
 
-  if (taosCheckVersion(pQueryMsg->version, version, 3) != 0) {
+  if (taosCheckVersion(pQueryMsg->version, version, 1) != 0) {
     return TSDB_CODE_QRY_INVALID_MSG;
   }