diff --git a/include/common/structure.h b/include/common/structure.h
index 1268381..b74add1 100644
--- a/include/common/structure.h
+++ b/include/common/structure.h
@@ -16,7 +16,9 @@ uint32_t** uint32_list_init();
 char* uint32_list_dump(uint32_t **int_list);
 void uint32_list_free(uint32_t **uint32_list);
 uint32_t uint32_list_len(uint32_t **int_list);
-uint32_t** uint32_list_append(uint32_t **int_list, uint32_t number);
-uint32_t** uint32_list_update(uint32_t **base_list, uint32_t **update_list);
+void uint32_list_append(uint32_t ***uint32_list, uint32_t number);
+//uint32_t** uint32_list_append(uint32_t **int_list, uint32_t number);
+void uint32_list_update(uint32_t ***base_list, uint32_t **update_list);
+//uint32_t** uint32_list_update(uint32_t **base_list, uint32_t **update_list);
 
 #endif
diff --git a/src/cleardns.c b/src/cleardns.c
index 772baec..271e6c1 100644
--- a/src/cleardns.c
+++ b/src/cleardns.c
@@ -46,27 +46,50 @@ int main(int argc, char *argv[]) { // ClearDNS service
     LOG_LEVEL = LOG_DEBUG;
     log_info("ClearDNS server start (%s)", VERSION);
 
-    char **test = string_list_init();
-    log_info("len -> %u", string_list_len(test));
-    string_list_append(&test, "test1");
-    string_list_append(&test, "test2");
-    string_list_append(&test, "test3");
-    log_info("len -> %u", string_list_len(test));
-
-    char *temp = string_list_dump(test);
+//    char **test = string_list_init();
+//    log_info("len -> %u", string_list_len(test));
+//    string_list_append(&test, "test1");
+//    string_list_append(&test, "test2");
+//    string_list_append(&test, "test3");
+//    log_info("len -> %u", string_list_len(test));
+//
+//    char *temp = string_list_dump(test);
+//    log_info("content -> %s", temp);
+//    free(temp);
+//
+//    char **add = string_list_init();
+//    string_list_append(&add, "test4");
+//    string_list_append(&add, "test5");
+//
+//    string_list_update(&test, add);
+//    log_info("len -> %d", string_list_len(test));
+//    temp = string_list_dump(test);
+//    log_info("content -> %s", temp);
+//    free(temp);
+
+
+    uint32_t **test = uint32_list_init();
+    log_info("len -> %u", uint32_list_len(test));
+    uint32_list_append(&test, 1);
+    uint32_list_append(&test, 2);
+    uint32_list_append(&test, 3);
+    log_info("len -> %u", uint32_list_len(test));
+
+    char *temp = uint32_list_dump(test);
     log_info("content -> %s", temp);
     free(temp);
 
-    char **add = string_list_init();
-    string_list_append(&add, "test4");
-    string_list_append(&add, "test5");
+    uint32_t **add = uint32_list_init();
+    uint32_list_append(&add, 4);
+    uint32_list_append(&add, 5);
 
-    string_list_update(&test, add);
-    log_info("len -> %d", string_list_len(test));
-    temp = string_list_dump(test);
+    uint32_list_update(&test, add);
+    log_info("len -> %d", uint32_list_len(test));
+    temp = uint32_list_dump(test);
     log_info("content -> %s", temp);
     free(temp);
 
+
 //    process *test = process_init("TEST", "lls");
 //    process *test = process_init("TEST", "ls");
 //    process_add_arg(test, "-al");
diff --git a/src/common/json.c b/src/common/json.c
index faccd76..56742c2 100644
--- a/src/common/json.c
+++ b/src/common/json.c
@@ -110,14 +110,14 @@ char** json_string_list_value(char *key, cJSON *json, char **string_list) { // j
 
 uint32_t** json_uint32_list_value(char *key, cJSON *json, uint32_t **uint32_list) { // json uint32 array -> uint32 list
     if (cJSON_IsNumber(json)) {
-        uint32_list = uint32_list_append(uint32_list, json->valueint);
+        uint32_list_append(&uint32_list, json->valueint);
     } else if (cJSON_IsArray(json)) {
         json = json->child;
         while (json != NULL) {
             if (!cJSON_IsNumber(json)) {
                 log_fatal("`%s` must be number array", key);
             }
-            uint32_list = uint32_list_append(uint32_list, json->valueint);
+            uint32_list_append(&uint32_list, json->valueint);
             json = json->next; // next key
         }
     } else if (!cJSON_IsNull(json)) { // allow null -> empty uint32 list
diff --git a/src/common/structure.c b/src/common/structure.c
index d0bf9b2..1251091 100644
--- a/src/common/structure.c
+++ b/src/common/structure.c
@@ -84,20 +84,20 @@ uint32_t uint32_list_len(uint32_t **uint32_list) { // get len of uint32 list
     return num - 1;
 }
 
-uint32_t** uint32_list_append(uint32_t **uint32_list, uint32_t number) { // add new uint32 at the end of list
-    uint32_t len = uint32_list_len(uint32_list);
-    uint32_list = (uint32_t **)realloc(uint32_list, sizeof(uint32_t *) * (len + 2));
-    uint32_list[len] = (uint32_t *)malloc(sizeof(uint32_t));
-    *uint32_list[len] = number;
-    uint32_list[len + 1] = NULL; // list end sign
-    return uint32_list;
+void uint32_list_append(uint32_t ***uint32_list, uint32_t number) { // add new uint32 at the end of list
+    uint32_t len = uint32_list_len(*uint32_list);
+    *uint32_list = (uint32_t **)realloc(*uint32_list, sizeof(uint32_t *) * (len + 2));
+    (*uint32_list)[len] = (uint32_t *)malloc(sizeof(uint32_t));
+    *(*uint32_list)[len] = number;
+    (*uint32_list)[len + 1] = NULL; // list end sign
+//    return uint32_list;
 }
 
-uint32_t** uint32_list_update(uint32_t **base_list, uint32_t **update_list) { // combine two uint32 list
+void uint32_list_update(uint32_t ***base_list, uint32_t **update_list) { // combine two uint32 list
     for (uint32_t **number = update_list; *number != NULL; ++number) {
-        base_list = uint32_list_append(base_list, **number);
+        uint32_list_append(base_list, **number);
     }
-    return base_list;
+//    return base_list;
 }
 
 void uint32_list_free(uint32_t **uint32_list) { // free uint32 list
diff --git a/src/loader/loader.c b/src/loader/loader.c
index 1c3ae82..64b5313 100644
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -93,7 +93,7 @@ overture* load_diverter(cleardns_config *config) {
     free(china_ip);
     free(gfwlist);
 
-    diverter->reject_type = uint32_list_update(diverter->reject_type, config->reject);
+    uint32_list_update(&diverter->reject_type, config->reject);
     load_diverter_assets();
     return diverter;
 }