diff --git a/haxe_libraries/why-dbus.hxml b/haxe_libraries/why-dbus.hxml
index e378a22..c08f8f8 100644
--- a/haxe_libraries/why-dbus.hxml
+++ b/haxe_libraries/why-dbus.hxml
@@ -1,5 +1,5 @@
-# @install: lix --silent download "gh://github.com/why-haxe/why-dbus#f84f1971bf49748bb57eef4c06fe1b87c622ea01" into why-dbus/0.0.0/github/f84f1971bf49748bb57eef4c06fe1b87c622ea01
+# @install: lix --silent download "gh://github.com/why-haxe/why-dbus#b02b032942338667196c71d811530e5584e06113" into why-dbus/0.0.0/github/b02b032942338667196c71d811530e5584e06113
 -lib tink_chunk
 -lib tink_xml
--cp ${HAXE_LIBCACHE}/why-dbus/0.0.0/github/f84f1971bf49748bb57eef4c06fe1b87c622ea01/src
+-cp ${HAXE_LIBCACHE}/why-dbus/0.0.0/github/b02b032942338667196c71d811530e5584e06113/src
 -D why-dbus=0.0.0
\ No newline at end of file
diff --git a/src/org/bluez/GattCharacteristic1.hx b/src/org/bluez/GattCharacteristic1.hx
index c912594..cf6644a 100644
--- a/src/org/bluez/GattCharacteristic1.hx
+++ b/src/org/bluez/GattCharacteristic1.hx
@@ -15,6 +15,7 @@ interface GattCharacteristic1 {
 	
 	function readValue(options:Map<String, Variant>):Chunk;
 	function writeValue(value:Chunk, options:Map<String, Variant>):Void;
+	// function acquireNotify(options:Map<String, Variant>):Void;
 	function startNotify():Void;
 	function stopNotify():Void;
 }
\ No newline at end of file
diff --git a/src/why/bluez/BlueZ.hx b/src/why/bluez/BlueZ.hx
index 32427f3..edc7dce 100644
--- a/src/why/bluez/BlueZ.hx
+++ b/src/why/bluez/BlueZ.hx
@@ -22,28 +22,25 @@ class BlueZ {
 		this.destination = cnx.getDestination(DESTINATION);
 		this.manager = destination.getObject('/').getInterface(org.freedesktop.DBus.ObjectManager);
 		
-		this.deviceAdded = manager.interfacesAdded.select(tuple -> {
-			final path = tuple.v0;
-			final interfaces = tuple.v1;
-			switch interfaces['org.bluez.Device1'] {
-				case null: None;
-				case iface: Some(getDevice(path, iface['Address'].value));
-			}
+		this.deviceAdded = new Signal(cb -> {
+			manager.interfacesAdded.handle((path, interfaces) -> {
+				switch interfaces['org.bluez.Device1'] {
+					case null: // skip
+					case iface: cb(getDevice(path, iface['Address'].value));
+				}
+			});
 		});
-		this.deviceRemoved = manager.interfacesRemoved.select(tuple -> {
-			final path = tuple.v0;
-			final interfaces = tuple.v1;
-			if(interfaces.contains('org.bluez.Device1')) {
-				switch devices[path] {
-					case null:
-						None;
-					case device:
-						devices.remove(path);
-						Some(device);
+		this.deviceRemoved = new Signal(cb -> {
+			manager.interfacesRemoved.handle((path, interfaces) -> {
+				if(interfaces.contains('org.bluez.Device1')) {
+					switch devices[path] {
+						case null: // skip
+						case device:
+							devices.remove(path);
+							cb(device);
+					}
 				}
-			} else {
-				None;
-			}
+			});
 		});
 	}
 	
diff --git a/tests/Playground.hx b/tests/Playground.hx
index c023097..e155462 100644
--- a/tests/Playground.hx
+++ b/tests/Playground.hx
@@ -171,10 +171,13 @@ class Playground {
 
 class EmptyObjectManager implements why.dbus.server.Interface<org.freedesktop.DBus.ObjectManager> {
 	
-	public final interfacesAdded = Signal.trigger();
-	public final interfacesRemoved = Signal.trigger();
+	public final interfacesAdded:why.dbus.server.Signal<ObjectPath, Map<String, Map<String, Variant>>>;
+	public final interfacesRemoved:why.dbus.server.Signal<ObjectPath, Array<String>>;
 	
-	public function new() {}
+	public function new() {
+		interfacesAdded = null;
+		interfacesRemoved = null;
+	}
 
 	public function getManagedObjects():tink.core.Promise<Map<ObjectPath, Map<String, Map<String, Variant>>>> {
 		trace('EmptyObjectManager');
@@ -216,8 +219,8 @@ class Application implements why.dbus.server.Interface<org.freedesktop.DBus.Obje
 	public final interfacesRemoved:why.dbus.server.Signal<ObjectPath, Array<String>>;
 	
 	public function new() {
-		interfacesAdded = tink.core.Signal.trigger();
-		interfacesRemoved = tink.core.Signal.trigger();
+		interfacesAdded = null;
+		interfacesRemoved = null;
 	}
 	
 	public function getManagedObjects():Promise<Map<ObjectPath, Map<String, Map<String, Variant>>>> {