diff --git a/Discord.C++/Discord.cpp b/Discord.C++/Discord.cpp
index be37fbc..47e0247 100644
--- a/Discord.C++/Discord.cpp
+++ b/Discord.C++/Discord.cpp
@@ -129,7 +129,7 @@ void DiscordCPP::Discord::update_presence(const std::string &status, Activity ac
              {"since", {}},       //
              {"status", status},  //
              {"afk", afk}         //
-         }}                       //
+         }}  //
     };
 
     if (activity.get_type() == Activity::NoActivity)
@@ -467,8 +467,7 @@ void DiscordCPP::Discord::handle_raw_event(const std::string &event_name,
             }
         }
 
-        voice_state->endpoint = "wss://" + data.at("endpoint").get<std::string>();
-        voice_state->endpoint += "?v=4";
+        voice_state->endpoint = "wss://" + data.at("endpoint").get<std::string>() + VOICE_GATEWAY_QUERY;
         voice_state->voice_token = data.at("token").get<std::string>();
     } else if (event_name == "INTERACTION_CREATE") {
         try {
diff --git a/Discord.C++/Gateway.cpp b/Discord.C++/Gateway.cpp
index f2b9e85..b475dc5 100644
--- a/Discord.C++/Gateway.cpp
+++ b/Discord.C++/Gateway.cpp
@@ -93,7 +93,8 @@ DiscordCPP::Gateway::Gateway(std::string token, const std::shared_ptr<Threadpool
       _heartbeat_interval(0),
       _keepalive(true),
       _reconnect_timeout(0),
-      _connected(false) {
+      _connected(false),
+      _sequence_number(0) {
     _log = Logger("Discord.Gateway");
 
     ssl_context.set_verify_mode(ssl::verify_peer | boost::asio::ssl::verify_fail_if_no_peer_cert);
diff --git a/Discord.C++/Gateway.h b/Discord.C++/Gateway.h
index 9cd9db3..2cec47f 100644
--- a/Discord.C++/Gateway.h
+++ b/Discord.C++/Gateway.h
@@ -40,6 +40,8 @@ class Gateway {
     std::thread _heartbeat_task;
     /// indicator if Gateway is connected
     bool _connected;
+    /// current sequence number
+    unsigned int _sequence_number;
     /// logging instance
     Logger _log;
     /// the message handler set by using set_message_handler
diff --git a/Discord.C++/MainGateway.cpp b/Discord.C++/MainGateway.cpp
index a6206b3..718ab42 100644
--- a/Discord.C++/MainGateway.cpp
+++ b/Discord.C++/MainGateway.cpp
@@ -153,8 +153,8 @@ void DiscordCPP::MainGateway::identify() {
                      {"intents", _intents.getIntents()},   //
                      {"shard", {_shard_id, _num_shards}},  //
                      {"large_threshold", 250}              //
-                 }                                         //
-        }                                                  //
+                 }  //
+        }  //
     };
 
 #ifdef _WIN32
@@ -196,7 +196,6 @@ DiscordCPP::MainGateway::MainGateway(std::string token,
     : Gateway::Gateway(std::move(token),
                        std::make_shared<Threadpool>(std::thread::hardware_concurrency() / num_shards)),
       _invalid_session(false),
-      _sequence_number(0),
       _shard_id(shard_id),
       _num_shards(num_shards),
       _intents(intents) {
diff --git a/Discord.C++/MainGateway.h b/Discord.C++/MainGateway.h
index 0373e86..9bc28a7 100644
--- a/Discord.C++/MainGateway.h
+++ b/Discord.C++/MainGateway.h
@@ -16,8 +16,6 @@ class MainGateway : public Gateway {
     std::string _session_id;
     /// indicator if we have a invalid session
     bool _invalid_session;
-    /// current sequence number
-    unsigned int _sequence_number;
     /// shard id
     unsigned int _shard_id;
     /// total number of shards
diff --git a/Discord.C++/VoiceClient.cpp b/Discord.C++/VoiceClient.cpp
index 3328e78..5c2f863 100644
--- a/Discord.C++/VoiceClient.cpp
+++ b/Discord.C++/VoiceClient.cpp
@@ -116,8 +116,8 @@ void DiscordCPP::VoiceClient::select_protocol() {
                                {"address", _my_ip},           //
                                {"port", _my_port},            //
                                {"mode", "xsalsa20_poly1305"}  //
-                           }}                                 //
-              }}                                              //
+                           }}  //
+              }}  //
     };
 
     _voice_ws->send(payload).get();
@@ -139,8 +139,8 @@ void DiscordCPP::VoiceClient::speak(bool speak) {
                      {"speaking", speak},  //
                      {"delay", 0},         //
                      {"ssrc", _ssrc}       //
-                 }                         //
-        }                                  //
+                 }  //
+        }  //
     };
 
     _voice_ws->send(payload).get();
@@ -154,15 +154,19 @@ DiscordCPP::VoiceClient::VoiceClient(std::shared_ptr<MainGateway> main_ws,
                                      std::string guild_id,
                                      std::string channel_id,
                                      const std::string& user_id)
-    : _guild_id(std::move(guild_id)),
+    : _voice_token(voice_token),
+      _endpoint(endpoint),
+      _session_id(session_id),
+      _guild_id(std::move(guild_id)),
       _channel_id(std::move(channel_id)),
+      _user_id(user_id),
       _main_ws(std::move(main_ws)) {
     threadpool = std::make_shared<Threadpool>(4);
 
     _log = Logger("Discord.VoiceClient");
     _log.info("connecting to endpoint " + _endpoint);
 
-    _voice_ws = std::make_unique<VoiceGateway>(voice_token, session_id, _guild_id, user_id, threadpool);
+    _voice_ws = std::make_unique<VoiceGateway>(_voice_token, _session_id, _guild_id, _user_id, threadpool);
 
     _voice_ws->set_message_handler([this](json data) {
         switch (data["op"].get<int>()) {
@@ -191,7 +195,7 @@ DiscordCPP::VoiceClient::VoiceClient(std::shared_ptr<MainGateway> main_ws,
         }
     });
 
-    _voice_ws->connect(endpoint);
+    _voice_ws->connect(_endpoint);
 
     while (_ready == false) {
         std::this_thread::sleep_for(std::chrono::milliseconds(10));
@@ -220,7 +224,7 @@ DiscordCPP::SharedFuture<void> DiscordCPP::VoiceClient::disconnect() {
                   {"channel_id", nullptr},  //
                   {"self_mute", true},      //
                   {"self_deaf", true}       //
-              }}                            //
+              }}  //
     };
     std::shared_ptr<DiscordCPP::Future<void>> main_future = _main_ws->send(payload).get_future();
     std::shared_ptr<DiscordCPP::Future<void>> voice_future = _voice_ws->close().get_future();
diff --git a/Discord.C++/VoiceGateway.cpp b/Discord.C++/VoiceGateway.cpp
index dcf50a1..cff02fe 100644
--- a/Discord.C++/VoiceGateway.cpp
+++ b/Discord.C++/VoiceGateway.cpp
@@ -3,18 +3,26 @@
 #include <utility>
 
 json DiscordCPP::VoiceGateway::get_heartbeat_payload() {
-    return {{"op", 3}, {"d", std::to_string(time(nullptr))}};
+    return {
+        {"op", 3},  //
+        {"d", {
+                  //
+                  {"t", std::to_string(time(nullptr))},                                               //
+                  {"seq_ack", ((_sequence_number == 0) ? "null" : std::to_string(_sequence_number))}  //
+              }}  //
+    };
 }
 
 void DiscordCPP::VoiceGateway::identify() {
     json out_payload = {
         {
             "d", {
-                     {"server_id", _guild_id},     //
-                     {"session_id", _session_id},  //
-                     {"token", _token}             //
-                 }                                 //
-        }                                          //
+                     {"server_id", _guild_id},                                                           //
+                     {"session_id", _session_id},                                                        //
+                     {"token", _token},                                                                  //
+                     {"seq_ack", ((_sequence_number == 0) ? "null" : std::to_string(_sequence_number))}  //
+                 }  //
+        }  //
     };
 
     if (_resume == true) {
@@ -40,6 +48,10 @@ void DiscordCPP::VoiceGateway::on_websocket_incoming_message(const std::string&
         json payload = json::parse(message);
         int op = payload["op"].get<int>();
 
+        if ((payload.count("seq") > 0) && payload["seq"].is_number_integer()) {
+            _sequence_number = payload["seq"].get<int>();
+        }
+
         switch (op) {
             case 2:
                 _reconnect_timeout = 0;
diff --git a/Discord.C++/static.h b/Discord.C++/static.h
index 3834de9..afef299 100644
--- a/Discord.C++/static.h
+++ b/Discord.C++/static.h
@@ -4,6 +4,7 @@
 #define GATEWAY_URL "wss://gateway.discord.gg?v=10&encoding=json&compress=zlib-stream"
 #define API_PREFIX "/api/v10"
 #define DISCORD_HOST "discord.com"
+#define VOICE_GATEWAY_QUERY "?v=8"
 
 #ifdef _WIN32
 #define DLL_EXPORT __declspec(dllexport)