diff --git a/front/src/Connexion/RoomConnection.ts b/front/src/Connexion/RoomConnection.ts
index f1dbde13..5cfc85c1 100644
--- a/front/src/Connexion/RoomConnection.ts
+++ b/front/src/Connexion/RoomConnection.ts
@@ -41,7 +41,7 @@ import {
     SetPlayerDetailsMessage as SetPlayerDetailsMessageTsProto,
     PingMessage as PingMessageTsProto,
     CharacterLayerMessage,
-} from "../Messages/ts-proto-generated/messages";
+} from "../Messages/ts-proto-generated/protos/messages";
 import { Subject } from "rxjs";
 import { selectCharacterSceneVisibleStore } from "../Stores/SelectCharacterStore";
 import { gameManager } from "../Phaser/Game/GameManager";
diff --git a/front/src/Network/ProtobufClientUtils.ts b/front/src/Network/ProtobufClientUtils.ts
index 3e172d0f..beec3d9f 100644
--- a/front/src/Network/ProtobufClientUtils.ts
+++ b/front/src/Network/ProtobufClientUtils.ts
@@ -1,4 +1,4 @@
-import { PositionMessage, PositionMessage_Direction } from "../Messages/ts-proto-generated/messages";
+import { PositionMessage, PositionMessage_Direction } from "../Messages/ts-proto-generated/protos/messages";
 
 import type { PointInterface } from "../Connexion/ConnexionModels";
 
diff --git a/messages/package.json b/messages/package.json
index 644065c9..4cef28dd 100644
--- a/messages/package.json
+++ b/messages/package.json
@@ -6,7 +6,7 @@
     "proto": "grpc_tools_node_protoc --plugin=protoc-gen-ts=./node_modules/.bin/protoc-gen-ts --grpc_out=generated --js_out=\"import_style=commonjs,binary:generated\" --ts_out=generated -I ./protos protos/*.proto",
     "ts-proto": "grpc_tools_node_protoc --plugin=./node_modules/.bin/protoc-gen-ts_proto --ts_proto_out=ts-proto-generated --ts_proto_opt=oneof=unions --ts_proto_opt=esModuleInterop=true protos/*.proto",
     "copy-to-back": "rm -rf ../back/src/Messages/generated && cp -rf generated/ ../back/src/Messages/generated",
-    "copy-to-front-ts-proto": "sed 's/import { Observable } from \"rxjs\";/import type { Observable } from \"rxjs\";/g' ts-proto-generated/protos/messages.ts > ../front/src/Messages/ts-proto-generated/messages.ts",
+    "copy-to-front-ts-proto": "cp -rf ts-proto-generated/* ../front/src/Messages/ts-proto-generated/ && sed -i 's/import { Observable } from \"rxjs\";/import type { Observable } from \"rxjs\";/g' ../front/src/Messages/ts-proto-generated/protos/messages.ts",
     "copy-to-pusher": "rm -rf ../pusher/src/Messages/generated && cp -rf generated/ ../pusher/src/Messages/generated",
     "json-copy-to-pusher": "rm -rf ../pusher/src/Messages/JsonMessages/* && cp -rf JsonMessages/* ../pusher/src/Messages/JsonMessages/",
     "json-copy-to-back": "rm -rf ../back/src/Messages/JsonMessages/* && cp -rf JsonMessages/* ../back/src/Messages/JsonMessages/",
diff --git a/messages/protos/messages.proto b/messages/protos/messages.proto
index 4ddb3941..35db5321 100644
--- a/messages/protos/messages.proto
+++ b/messages/protos/messages.proto
@@ -1,5 +1,7 @@
 syntax = "proto3";
 
+import "google/protobuf/wrappers.proto";
+
 /*********** PARTIAL MESSAGES **************/
 
 message PositionMessage {
@@ -189,8 +191,8 @@ message BatchMessage {
 message GroupUpdateMessage {
   int32 groupId = 1;
   PointMessage position = 2;
-  int32 groupSize = 3;
-  bool locked = 4;
+  google.protobuf.UInt32Value groupSize = 3;
+  google.protobuf.BoolValue locked = 4;
 }
 
 message GroupDeleteMessage {
diff --git a/pusher/src/Model/Zone.ts b/pusher/src/Model/Zone.ts
index 02a01d8d..f3b15ed2 100644
--- a/pusher/src/Model/Zone.ts
+++ b/pusher/src/Model/Zone.ts
@@ -22,6 +22,7 @@ import {
 import { ClientReadableStream } from "grpc";
 import { PositionDispatcher } from "_Model/PositionDispatcher";
 import Debug from "debug";
+import { BoolValue, UInt32Value } from "google-protobuf/google/protobuf/wrappers_pb";
 
 const debug = Debug("zone");
 
@@ -125,9 +126,9 @@ export class UserDescriptor {
 export class GroupDescriptor {
     private constructor(
         public readonly groupId: number,
-        private groupSize: number,
+        private groupSize: number | undefined,
         private position: PointMessage,
-        private locked: boolean
+        private locked: boolean | undefined
     ) {}
 
     public static createFromGroupUpdateZoneMessage(message: GroupUpdateZoneMessage): GroupDescriptor {
@@ -150,9 +151,13 @@ export class GroupDescriptor {
             throw new Error("GroupDescriptor.groupId is not an integer: " + this.groupId);
         }
         groupUpdateMessage.setGroupid(this.groupId);
-        groupUpdateMessage.setGroupsize(this.groupSize);
+        if (this.groupSize !== undefined) {
+            groupUpdateMessage.setGroupsize(new UInt32Value().setValue(this.groupSize));
+        }
         groupUpdateMessage.setPosition(this.position);
-        groupUpdateMessage.setLocked(this.locked);
+        if (this.locked !== undefined) {
+            groupUpdateMessage.setLocked(new BoolValue().setValue(this.locked));
+        }
         return groupUpdateMessage;
     }
 }