diff --git a/src/extern/kwin.d.ts b/src/extern/kwin.d.ts
index a9be8b9..f849a46 100644
--- a/src/extern/kwin.d.ts
+++ b/src/extern/kwin.d.ts
@@ -10,15 +10,15 @@ declare const workspace: {
 
     activeClient: KwinClient;
 
-    readonly currentDesktopChanged: QSignal<[oldDesktopNumber: number]>
+    readonly currentDesktopChanged: QSignal<[void]>
     readonly clientAdded: QSignal<[KwinClient]>;
     readonly clientRemoved: QSignal<[KwinClient]>;
     readonly clientMinimized: QSignal<[KwinClient]>;
     readonly clientUnminimized: QSignal<[KwinClient]>;
     readonly clientMaximizeSet: QSignal<[KwinClient, horizontally: boolean, vertically: boolean]>;
     readonly clientActivated: QSignal<[KwinClient]>;
-    readonly numberDesktopsChanged: QSignal<[oldNumberOfVirtualDesktops: number]>;
-    readonly currentActivityChanged: QSignal<[newActivity: string]>;
+    readonly numberDesktopsChanged: QSignal<[void]>;
+    readonly currentActivityChanged: QSignal<[void]>;
     readonly virtualScreenSizeChanged: QSignal<[void]>;
 
     clientArea(option: ClientAreaOption, screenNumber: number, desktopNumber: number);
@@ -67,9 +67,9 @@ interface KwinClient {
 
     readonly fullScreenChanged: QSignal<[void]>;
     readonly desktopChanged: QSignal<[void]>;
-    readonly activitiesChanged: QSignal<[KwinClient]>;
+    readonly activitiesChanged: QSignal<[void]>;
     readonly captionChanged: QSignal<[void]>;
-    readonly tileChanged: QSignal<[Tile]>;
+    readonly tileChanged: QSignal<[void]>;
     readonly moveResizedChanged: QSignal<[void]>;
     readonly moveResizeCursorChanged: QSignal<[void]>;
     readonly clientStartUserMovedResized: QSignal<[void]>;
diff --git a/src/workspace.ts b/src/workspace.ts
index ec949c6..f175173 100644
--- a/src/workspace.ts
+++ b/src/workspace.ts
@@ -60,7 +60,7 @@ function initWorkspaceSignalHandlers(world: World) {
         world.do(() => {}); // re-arrange desktop
     });
 
-    manager.connect(workspace.numberDesktopsChanged, (oldNumberOfVirtualDesktops: number) => {
+    manager.connect(workspace.numberDesktopsChanged, () => {
         world.updateDesktops();
     });
 
diff --git a/src/world/clientState/Pinned.ts b/src/world/clientState/Pinned.ts
index a2e837c..57b52a4 100644
--- a/src/world/clientState/Pinned.ts
+++ b/src/world/clientState/Pinned.ts
@@ -68,7 +68,7 @@ namespace ClientState {
                 oldDesktopNumber = kwinClient.desktop;
             });
 
-            manager.connect(kwinClient.activitiesChanged, (kwinClient: KwinClient) => {
+            manager.connect(kwinClient.activitiesChanged, () => {
                 const desktops = kwinClient.desktop === -1 ? [] : [kwinClient.desktop];
                 const changedActivities = oldActivities.length === 0 || kwinClient.activities.length === 0 ?
                     [] :