diff --git a/benchmark/check_proxy.cpp b/benchmark/check_proxy.cpp
index a493b1c46..e1ff5523e 100644
--- a/benchmark/check_proxy.cpp
+++ b/benchmark/check_proxy.cpp
@@ -160,20 +160,22 @@ int main(int argc, char **argv) {
 
   SET_VERBOSITY_LEVEL(new_verbosity_level);
 
-  td::Client client;
+  td::ClientManager client_manager;
+  auto client_id = client_manager.create_client();
   for (size_t i = 0; i < requests.size(); i++) {
     auto &request = requests[i].second;
     request->dc_id_ = dc_id;
     request->timeout_ = timeout;
-    client.send({i + 1, std::move(request)});
+    client_manager.send(client_id, i + 1, std::move(request));
   }
   size_t successful_requests = 0;
   size_t failed_requests = 0;
 
   while (successful_requests + failed_requests != requests.size()) {
-    auto response = client.receive(100.0);
-    if (1 <= response.id && response.id <= requests.size()) {
-      auto &proxy = requests[static_cast<size_t>(response.id - 1)].first;
+    auto response = client_manager.receive(100.0);
+    CHECK(client_id == response.client_id);
+    if (1 <= response.request_id && response.request_id <= requests.size()) {
+      auto &proxy = requests[static_cast<size_t>(response.request_id - 1)].first;
       if (response.object->get_id() == td::td_api::error::ID) {
         LOG(ERROR) << proxy << ": " << to_string(response.object);
         failed_requests++;