diff --git a/ChatApp/app/src/main/java/ChatApp.java b/ChatApp/app/src/main/java/ChatApp.java
index afe178f..5c8a22d 100644
--- a/ChatApp/app/src/main/java/ChatApp.java
+++ b/ChatApp/app/src/main/java/ChatApp.java
@@ -8,11 +8,11 @@ public class ChatApp {
         Server server = new Server(6665);
         ClientConsole client = new ClientConsole(new InetSocketAddress("localhost", 6665));
 
-        client.onConnect.connect(() -> {
+        client.onConnect.connect((arg) -> {
             client.getClientInterface().SendCreateRoom("101");
         });
 
-        client.onDisconnect.connect(() -> {
+        client.onDisconnect.connect((arg) -> {
             System.out.println("Stopping server ...");
     
             server.close();
diff --git a/ChatApp/app/src/main/java/client/ClientConnexion.java b/ChatApp/app/src/main/java/client/ClientConnexion.java
index 7feb51a..a664d7f 100644
--- a/ChatApp/app/src/main/java/client/ClientConnexion.java
+++ b/ChatApp/app/src/main/java/client/ClientConnexion.java
@@ -20,7 +20,7 @@ public class ClientConnexion implements PacketVisitor, PacketHandler {
 		this.serverAddress = serverAddress;
 		this.socket = socket;
 		this.callback = callback;
-		this.socket.onClose.connect(this::onSocketClose);
+		this.socket.onClose.connect((args) -> onSocketClose());
 		this.socket.addHandler(this);
 	}
 
diff --git a/ChatApp/app/src/main/java/utilities/Signal.java b/ChatApp/app/src/main/java/utilities/Signal.java
index affdffb..60411f2 100644
--- a/ChatApp/app/src/main/java/utilities/Signal.java
+++ b/ChatApp/app/src/main/java/utilities/Signal.java
@@ -5,13 +5,15 @@ import java.util.Set;
 
 public class Signal {
 
-	private final Set<Runnable> listeners;
+	private final Class<?>[] types;
+	private final Set<Slot> listeners;
 
-	public Signal() {
+	public Signal(Class<?>... types) {
+		this.types = types;
 		this.listeners = new HashSet<>();
 	}
 
-	public void connect(Runnable listener) {
+	public void connect(Slot listener) {
 		this.listeners.add(listener);
 	}
 
@@ -19,9 +21,17 @@ public class Signal {
 		this.listeners.clear();
 	}
 
-	public void emit() {
-		for (Runnable listener : this.listeners) {
-			listener.run();
+	public void emit(Object... values) {
+		for (Slot listener : this.listeners) {
+			if (values.length != types.length) {
+				throw new UnsupportedOperationException("The number of provided arguments is not right");
+			}
+			for (int i = 0; i < values.length; i++) {
+				if (!types[i].isInstance(values[i])) {
+					throw new UnsupportedOperationException("Incorrect value at index " + i);
+				}
+			}
+			listener.run(values);
 		}
 	}
 
diff --git a/ChatApp/app/src/main/java/utilities/Slot.java b/ChatApp/app/src/main/java/utilities/Slot.java
new file mode 100644
index 0000000..b97dc77
--- /dev/null
+++ b/ChatApp/app/src/main/java/utilities/Slot.java
@@ -0,0 +1,5 @@
+package utilities;
+
+public interface Slot {
+	void run(Object ... args);
+}