diff --git a/.gitmodules b/.gitmodules
index af79585d..2f46cb5f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -40,7 +40,7 @@
 [submodule "deps/protobuf"]
 	path = deps/protobuf
 	url = https://github.com/protocolbuffers/protobuf.git
-	branch = 3.17.x
+	branch = 3.20.x
 [submodule "deps/zlib"]
 	path = deps/zlib
 	url = https://github.com/madler/zlib.git
diff --git a/deps/protobuf b/deps/protobuf
index 5500c72c..6e9e6036 160000
--- a/deps/protobuf
+++ b/deps/protobuf
@@ -1 +1 @@
-Subproject commit 5500c72c5b616da9f0125bcfab513987a1226e2b
+Subproject commit 6e9e60367d8744e86856590d8ea0e793c61deeec
diff --git a/src/client/component/bots.cpp b/src/client/component/bots.cpp
index 896f00a7..019242fd 100644
--- a/src/client/component/bots.cpp
+++ b/src/client/component/bots.cpp
@@ -60,7 +60,7 @@ namespace bots
 
 			if (bot_ent)
 			{
-				spawn_bot(bot_ent->s.entityNum);
+				spawn_bot(bot_ent->s.number);
 			}
 			else
 			{
diff --git a/src/client/component/command.cpp b/src/client/component/command.cpp
index 6b4febb2..c26eea7e 100644
--- a/src/client/component/command.cpp
+++ b/src/client/component/command.cpp
@@ -1,6 +1,10 @@
 #include <std_include.hpp>
 #include "loader/component_loader.hpp"
 
+#include "game/game.hpp"
+#include "game/dvars.hpp"
+#include "game/scripting/execution.hpp"
+
 #include "command.hpp"
 #include "console.hpp"
 #include "game_console.hpp"
@@ -8,11 +12,6 @@
 #include "scheduler.hpp"
 #include "logfile.hpp"
 
-#include "game/game.hpp"
-#include "game/dvars.hpp"
-
-#include "game/scripting/execution.hpp"
-
 #include <utils/hook.hpp>
 #include <utils/string.hpp>
 #include <utils/memory.hpp>
@@ -39,8 +38,14 @@ namespace command
 			}
 		}
 
-		void client_command(const int client_num)
+		void client_command(const char client_num)
 		{
+			if (game::mp::g_entities[client_num].client == nullptr)
+			{
+				// Client is not fully connected
+				return;
+			}
+
 			if (!logfile::client_command_stub(client_num))
 			{
 				return;
@@ -539,9 +544,9 @@ namespace command
 		static void add_commands_generic()
 		{
 			add("quit", game::Quit);
-			add("crash", []()
+			add("crash", []
 			{
-				*reinterpret_cast<int*>(1) = 0;
+				*reinterpret_cast<int*>(1) = 0x12345678;
 			});
 
 			add("commandDump", [](const params& argument)
diff --git a/src/client/component/logfile.cpp b/src/client/component/logfile.cpp
index 2e2b3e4f..64600ffe 100644
--- a/src/client/component/logfile.cpp
+++ b/src/client/component/logfile.cpp
@@ -32,7 +32,7 @@ namespace logfile
 				return {};
 			}
 
-			const scripting::entity player{game::Scr_GetEntityId(ent->s.entityNum, 0)};
+			const scripting::entity player{game::Scr_GetEntityId(ent->s.number, 0)};
 			return scripting::lua::convert(state, player);
 		}
 
@@ -262,7 +262,7 @@ namespace logfile
 			scheduler::once([cmd, message, self, hidden]()
 			{
 				const scripting::entity level{*game::levelEntityId};
-				const scripting::entity player{game::Scr_GetEntityId(self->s.entityNum, 0)};
+				const scripting::entity player{game::Scr_GetEntityId(self->s.number, 0)};
 
 				scripting::notify(level, cmd, {player, message, hidden});
 				scripting::notify(player, cmd, {message, hidden});
diff --git a/src/client/component/patches.cpp b/src/client/component/patches.cpp
index 9ea0deb6..c84d6c01 100644
--- a/src/client/component/patches.cpp
+++ b/src/client/component/patches.cpp
@@ -122,7 +122,7 @@ namespace patches
 
 			command::params_sv params{};
 			const auto menu_id = atoi(params.get(1));
-			const auto client = &svs_clients[ent->s.entityNum];
+			const auto client = &svs_clients[ent->s.number];
 
 			// 13 => change class
 			if (menu_id == 13 && ent->client->team == game::mp::TEAM_SPECTATOR)
diff --git a/src/client/game/structs.hpp b/src/client/game/structs.hpp
index 02ee96aa..a75ed125 100644
--- a/src/client/game/structs.hpp
+++ b/src/client/game/structs.hpp
@@ -1565,7 +1565,7 @@ namespace game
 
 		struct EntityState
 		{
-			uint16_t entityNum;
+			uint16_t number;
 		}; // size = ?
 
 #pragma pack(push, 1)
diff --git a/src/common/utils/flags.cpp b/src/common/utils/flags.cpp
index 09f13114..a90247ac 100644
--- a/src/common/utils/flags.cpp
+++ b/src/common/utils/flags.cpp
@@ -21,7 +21,8 @@ namespace utils::flags
 				if (wide_flag[0] == L'-')
 				{
 					wide_flag.erase(wide_flag.begin());
-					flags.emplace_back(string::convert(wide_flag));
+					const auto flag = string::convert(wide_flag);
+					flags.emplace_back(string::to_lower(flag));
 				}
 			}
 
@@ -40,14 +41,7 @@ namespace utils::flags
 			parsed = true;
 		}
 
-		for (const auto& entry : enabled_flags)
-		{
-			if (string::to_lower(entry) == string::to_lower(flag))
-			{
-				return true;
-			}
-		}
-
-		return false;
+		return std::ranges::any_of(enabled_flags.cbegin(), enabled_flags.cend(),
+			[flag](const auto& elem) { return elem == string::to_lower(flag); });
 	}
 }
diff --git a/src/common/utils/info_string.cpp b/src/common/utils/info_string.cpp
index 3b0287e3..56ed56ab 100644
--- a/src/common/utils/info_string.cpp
+++ b/src/common/utils/info_string.cpp
@@ -26,7 +26,7 @@ namespace utils
 			return value->second;
 		}
 
-		return "";
+		return {};
 	}
 
 	void info_string::parse(std::string buffer)
@@ -49,15 +49,15 @@ namespace utils
 	{
 		//auto first = true;
 		std::string info_string;
-		for (auto i = this->key_value_pairs_.begin(); i != this->key_value_pairs_.end(); ++i)
+		for (const auto& [key, val] : this->key_value_pairs_)
 		{
 			//if (first) first = false;
 			/*else*/
 			info_string.append("\\");
 
-			info_string.append(i->first); // Key
+			info_string.append(key);
 			info_string.append("\\");
-			info_string.append(i->second); // Value
+			info_string.append(val);
 		}
 
 		return info_string;
diff --git a/src/common/utils/io.cpp b/src/common/utils/io.cpp
index 9b161d39..52083ac9 100644
--- a/src/common/utils/io.cpp
+++ b/src/common/utils/io.cpp
@@ -32,7 +32,7 @@ namespace utils::io
 
 		if (stream.is_open())
 		{
-			stream.write(data.data(), data.size());
+			stream.write(data.data(), static_cast<std::streamsize>(data.size()));
 			stream.close();
 			return true;
 		}
diff --git a/src/common/utils/memory.cpp b/src/common/utils/memory.cpp
index 99a03916..12b36e70 100644
--- a/src/common/utils/memory.cpp
+++ b/src/common/utils/memory.cpp
@@ -72,7 +72,7 @@ namespace utils
 
 	void* memory::allocate(const size_t length)
 	{
-		return calloc(length, 1);
+		return std::calloc(length, 1);
 	}
 
 	char* memory::duplicate_string(const std::string& string)
@@ -86,7 +86,7 @@ namespace utils
 	{
 		if (data)
 		{
-			::free(data);
+			std::free(data);
 		}
 	}
 
diff --git a/tools/protoc.exe b/tools/protoc.exe
index 87bf60b6..cc258a52 100644
Binary files a/tools/protoc.exe and b/tools/protoc.exe differ