diff --git a/Cargo.toml b/Cargo.toml
index 7a58d330..37ac23c2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -278,7 +278,7 @@ tiny-skia = { version = "0.11", default-features = false, features = [
     "std",
     "simd",
 ] }
-cctk = { git = "https://github.com/pop-os/cosmic-protocols", package = "cosmic-client-toolkit", rev = "178eb0b" }
+cctk = { git = "https://github.com/pop-os/cosmic-protocols", package = "cosmic-client-toolkit", rev = "160b086" }
 softbuffer = { git = "https://github.com/pop-os/softbuffer", tag = "cosmic-4.0" }
 syntect = "5.2"
 tokio = "1.0"
diff --git a/runtime/src/platform_specific/wayland/mod.rs b/runtime/src/platform_specific/wayland/mod.rs
index ff4662a3..752ca49a 100644
--- a/runtime/src/platform_specific/wayland/mod.rs
+++ b/runtime/src/platform_specific/wayland/mod.rs
@@ -33,6 +33,16 @@ pub enum Action {
     Subsurface(subsurface::Action),
     /// Keyboard inhibit shortcuts
     InhibitShortcuts(bool),
+    /// Rounded corners in logical space
+    RoundedCorners(iced_core::window::Id, Option<CornerRadius>),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Default)]
+pub struct CornerRadius {
+    pub top_left: u32,
+    pub top_right: u32,
+    pub bottom_left: u32,
+    pub bottom_right: u32,
 }
 
 impl Debug for Action {
@@ -57,6 +67,9 @@ impl Debug for Action {
             Action::InhibitShortcuts(v) => {
                 f.debug_tuple("InhibitShortcuts").field(v).finish()
             }
+            Action::RoundedCorners(id, v) => {
+                f.debug_tuple("RoundedCorners").field(id).field(v).finish()
+            }
         }
     }
 }
diff --git a/winit/src/platform_specific/wayland/commands/corner_radius.rs b/winit/src/platform_specific/wayland/commands/corner_radius.rs
new file mode 100644
index 00000000..cf16961b
--- /dev/null
+++ b/winit/src/platform_specific/wayland/commands/corner_radius.rs
@@ -0,0 +1,20 @@
+use iced_futures::core::{border::Radius, window};
+use iced_runtime::{
+    self,
+    platform_specific::{
+        self,
+        wayland::{self, CornerRadius},
+    },
+    task, Action, Task,
+};
+
+pub fn corner_radius(
+    id: window::Id,
+    corners: Option<CornerRadius>,
+) -> Task<()> {
+    task::oneshot(|_| {
+        Action::PlatformSpecific(platform_specific::Action::Wayland(
+            wayland::Action::RoundedCorners(id, corners),
+        ))
+    })
+}
diff --git a/winit/src/platform_specific/wayland/commands/mod.rs b/winit/src/platform_specific/wayland/commands/mod.rs
index 38b22e42..191dc3a5 100644
--- a/winit/src/platform_specific/wayland/commands/mod.rs
+++ b/winit/src/platform_specific/wayland/commands/mod.rs
@@ -1,6 +1,7 @@
 //! Interact with the wayland objects of your application.
 
 pub mod activation;
+pub mod corner_radius;
 pub mod keyboard_shortcuts_inhibit;
 pub mod layer_surface;
 pub mod overlap_notify;
diff --git a/winit/src/platform_specific/wayland/event_loop/mod.rs b/winit/src/platform_specific/wayland/event_loop/mod.rs
index cdef9ff6..f1420989 100644
--- a/winit/src/platform_specific/wayland/event_loop/mod.rs
+++ b/winit/src/platform_specific/wayland/event_loop/mod.rs
@@ -18,7 +18,9 @@ use crate::{
     subsurface_widget::SubsurfaceState,
 };
 
-use cctk::sctk::reexports::calloop_wayland_source::WaylandSource;
+use cctk::{
+    cosmic_protocols::corner_radius::v1::client::cosmic_corner_radius_manager_v1::CosmicCornerRadiusManagerV1, sctk::reexports::calloop_wayland_source::WaylandSource, toplevel_info::ToplevelInfoState
+};
 use cctk::{
     sctk::{
         activation::ActivationState,
@@ -37,7 +39,6 @@ use cctk::{
         shell::{WaylandSurface, wlr_layer::LayerShell, xdg::XdgShell},
         shm::Shm,
     },
-    toplevel_info::ToplevelInfoState,
     toplevel_management::ToplevelManagerState,
 };
 use raw_window_handle::HasDisplayHandle;
@@ -126,7 +127,10 @@ impl SctkEventLoop {
                                 window,
                                 id,
                             ) => {
-                                state.windows.push(SctkWindow { window, id });
+                                state.windows.push(SctkWindow { window, id, corner_radius: Default::default() });
+                                if let Some(v) = state.pending_corner_radius.remove(&id) {
+                                    _ = state.handle_action(iced_runtime::platform_specific::wayland::Action::RoundedCorners(id, Some(v)));
+                                }
                             }
                             crate::platform_specific::Action::RemoveWindow(
                                 id,
@@ -201,7 +205,7 @@ impl SctkEventLoop {
                                     let half_h = size.height / 2.;
                                     match settings.gravity {
                                         wayland_protocols::xdg::shell::client::xdg_positioner::Gravity::None => {
-                                            // center on 
+                                            // center on
                                             loc.x -= half_w;
                                             loc.y -= half_h;
                                         },
@@ -306,6 +310,11 @@ impl SctkEventLoop {
                             &registry_state,
                             &qh,
                         ),
+                        corner_radius_manager: registry_state.bind_one::<CosmicCornerRadiusManagerV1, _, _>(
+                        &qh,
+                        1..=1,
+                        (),
+                    ).ok(),
                         toplevel_manager: ToplevelManagerState::try_new(
                             &registry_state,
                             &qh,
@@ -348,6 +357,7 @@ impl SctkEventLoop {
                         token_senders: HashMap::new(),
                         overlap_notifications: HashMap::new(),
                         subsurface_state: None,
+                        pending_corner_radius: HashMap::new(),
                     },
                     _features: Default::default(),
                 };
diff --git a/winit/src/platform_specific/wayland/event_loop/state.rs b/winit/src/platform_specific/wayland/event_loop/state.rs
index d5f4f0bc..549d1b77 100644
--- a/winit/src/platform_specific/wayland/event_loop/state.rs
+++ b/winit/src/platform_specific/wayland/event_loop/state.rs
@@ -1,8 +1,5 @@
 use crate::{
     Control,
-    sctk_event::KeyboardEventVariant,
-    subsurface_widget::SubsurfaceState,
-    wayland::SubsurfaceInstance,
     handlers::{
         activation::IcedRequestData,
         overlap::{OverlapNotificationV1, OverlapNotifyV1},
@@ -17,6 +14,9 @@ use crate::{
             sctk_event::{LayerSurfaceEventVariant, SctkEvent},
         },
     },
+    sctk_event::KeyboardEventVariant,
+    subsurface_widget::SubsurfaceState,
+    wayland::SubsurfaceInstance,
 };
 use iced_futures::{
     core::{Rectangle, Size},
@@ -27,7 +27,7 @@ use std::{
     collections::{HashMap, HashSet},
     convert::Infallible,
     fmt::Debug,
-    sync::{atomic::AtomicU32, Arc, Mutex},
+    sync::{Arc, Mutex, atomic::AtomicU32},
     thread::panicking,
     time::Duration,
 };
@@ -37,66 +37,85 @@ use winit::{
     platform::wayland::WindowExtWayland,
 };
 
+use cctk::{
+    cosmic_protocols::{
+        corner_radius::v1::client::{
+            cosmic_corner_radius_manager_v1::CosmicCornerRadiusManagerV1,
+            cosmic_corner_radius_toplevel_v1::CosmicCornerRadiusToplevelV1,
+        },
+        overlap_notify::v1::client::zcosmic_overlap_notification_v1::ZcosmicOverlapNotificationV1,
+    },
+    sctk::{
+        activation::{ActivationState, RequestData},
+        compositor::CompositorState,
+        error::GlobalError,
+        globals::GlobalData,
+        output::OutputState,
+        reexports::{
+            calloop::{LoopHandle, timer::TimeoutAction},
+            client::{
+                Connection, Proxy, QueueHandle, delegate_noop,
+                protocol::{
+                    wl_keyboard::WlKeyboard,
+                    wl_output::WlOutput,
+                    wl_region::WlRegion,
+                    wl_seat::WlSeat,
+                    wl_subsurface::WlSubsurface,
+                    wl_surface::{self, WlSurface},
+                    wl_touch::WlTouch,
+                },
+            },
+        },
+        registry::RegistryState,
+        seat::{
+            SeatState,
+            keyboard::KeyEvent,
+            pointer::{CursorIcon, PointerData, ThemedPointer},
+            touch::TouchData,
+        },
+        session_lock::{
+            SessionLock, SessionLockState, SessionLockSurface,
+            SessionLockSurfaceConfigure,
+        },
+        shell::{
+            WaylandSurface,
+            wlr_layer::{
+                Anchor, KeyboardInteractivity, Layer, LayerShell, LayerSurface,
+                LayerSurfaceConfigure, SurfaceKind,
+            },
+            xdg::{
+                XdgPositioner, XdgShell,
+                popup::{Popup, PopupConfigure},
+            },
+        },
+        shm::{Shm, multi::MultiPool},
+    },
+    toplevel_info::ToplevelInfoState,
+    toplevel_management::ToplevelManagerState,
+};
 use iced_runtime::{
     core::{self, Point, touch},
     keyboard::Modifiers,
     platform_specific::{
         self,
         wayland::{
-            layer_surface::{IcedMargin, IcedOutput, SctkLayerSurfaceSettings}, popup::SctkPopupSettings, subsurface::{self, SctkSubsurfaceSettings}, Action
+            Action, CornerRadius,
+            layer_surface::{IcedMargin, IcedOutput, SctkLayerSurfaceSettings},
+            popup::SctkPopupSettings,
+            subsurface::{self, SctkSubsurfaceSettings},
         },
     },
 };
-use cctk::{cosmic_protocols::overlap_notify::v1::client::zcosmic_overlap_notification_v1::ZcosmicOverlapNotificationV1, sctk::{
-    activation::{ActivationState, RequestData},
-    compositor::CompositorState,
-    error::GlobalError,
-    globals::GlobalData,
-    output::OutputState,
-    reexports::{
-        calloop::{LoopHandle, timer::TimeoutAction},
-        client::{
-            Connection, Proxy, QueueHandle, delegate_noop,
-            protocol::{
-                wl_keyboard::WlKeyboard,
-                wl_output::WlOutput,
-                wl_region::WlRegion,
-                wl_seat::WlSeat,
-                wl_subsurface::WlSubsurface,
-                wl_surface::{self, WlSurface},
-                wl_touch::WlTouch,
-            },
-        },
-    },
-    registry::RegistryState,
-    seat::{
-        SeatState,
-        keyboard::KeyEvent,
-        pointer::{CursorIcon, PointerData, ThemedPointer},
-        touch::TouchData,
-    },
-    session_lock::{
-        SessionLock, SessionLockState, SessionLockSurface,
-        SessionLockSurfaceConfigure,
-    },
-    shell::{
-        WaylandSurface,
-        wlr_layer::{
-            Anchor, KeyboardInteractivity, Layer, LayerShell, LayerSurface,
-            LayerSurfaceConfigure, SurfaceKind,
-        },
-        xdg::{
-            XdgPositioner, XdgShell,
-            popup::{Popup, PopupConfigure},
-        },
-    },
-    shm::{multi::MultiPool, Shm},
-}, toplevel_info::ToplevelInfoState, toplevel_management::ToplevelManagerState};
 use wayland_protocols::{
     wp::{
-        fractional_scale::v1::client::wp_fractional_scale_v1::WpFractionalScaleV1, keyboard_shortcuts_inhibit::zv1::client::{zwp_keyboard_shortcuts_inhibit_manager_v1, zwp_keyboard_shortcuts_inhibitor_v1}, viewporter::client::wp_viewport::WpViewport
+        fractional_scale::v1::client::wp_fractional_scale_v1::WpFractionalScaleV1,
+        keyboard_shortcuts_inhibit::zv1::client::{
+            zwp_keyboard_shortcuts_inhibit_manager_v1,
+            zwp_keyboard_shortcuts_inhibitor_v1,
+        },
+        viewporter::client::wp_viewport::WpViewport,
     },
-    xdg::shell::client::xdg_surface::XdgSurface,
+    xdg::shell::client::{xdg_surface::XdgSurface, xdg_toplevel::XdgToplevel},
 };
 
 pub static TOKEN_CTR: AtomicU32 = AtomicU32::new(0);
@@ -311,9 +330,22 @@ pub struct SctkPopupData {
     pub(crate) grab: bool,
 }
 
+#[derive(Debug)]
+pub struct MyCosmicCornerRadiusToplevelV1(CosmicCornerRadiusToplevelV1);
+
+impl Drop for MyCosmicCornerRadiusToplevelV1 {
+    fn drop(&mut self) {
+        self.0.destroy();
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct SctkCornerRadius(Arc<MyCosmicCornerRadiusToplevelV1>);
+
 pub struct SctkWindow {
     pub(crate) window: Arc<dyn winit::window::Window>,
     pub(crate) id: core::window::Id,
+    pub(crate) corner_radius: Option<(SctkCornerRadius, CornerRadius)>,
 }
 
 impl SctkWindow {
@@ -348,6 +380,19 @@ impl SctkWindow {
         .unwrap();
         XdgSurface::from_id(conn, id).unwrap()
     }
+
+    pub fn xdg_toplevel(&self, conn: &Connection) -> XdgToplevel {
+        let window_handle = self.window.xdg_toplevel().unwrap();
+
+        let id = unsafe {
+            ObjectId::from_ptr(
+                XdgToplevel::interface(),
+                window_handle.as_ptr().cast(),
+            )
+        }
+        .unwrap();
+        XdgToplevel::from_id(conn, id).unwrap()
+    }
 }
 
 pub(crate) enum FrameStatus {
@@ -436,6 +481,9 @@ pub struct SctkState {
     pub(crate) inhibitor: Option<zwp_keyboard_shortcuts_inhibitor_v1::ZwpKeyboardShortcutsInhibitorV1>,
     pub(crate) inhibited: bool,
     pub(crate) inhibitor_manager: Option<zwp_keyboard_shortcuts_inhibit_manager_v1::ZwpKeyboardShortcutsInhibitManagerV1>,
+
+    pub(crate) corner_radius_manager: Option<CosmicCornerRadiusManagerV1>,
+    pub(crate) pending_corner_radius: HashMap<core::window::Id, CornerRadius>
 }
 
 /// An error that occurred while running an application.
@@ -722,6 +770,7 @@ impl SctkState {
                 else {
                     return Err(PopupCreationError::ParentMissing);
                 };
+
                 (
                     &parent_window.wl_surface(&self.connection),
                     Popup::from_surface(
@@ -1468,7 +1517,7 @@ impl SctkState {
             Action::InhibitShortcuts(v) => {
                 if let Some(manager) = self.inhibitor_manager.as_ref() {
                     if let Some(inhibit) = self.inhibitor.take() {
-                            inhibit.destroy();
+                        inhibit.destroy();
                     }
                     if v {
                         self.inhibitor = self.seats.iter().next()
@@ -1476,6 +1525,45 @@ impl SctkState {
                     }
                 }
             }
+            Action::RoundedCorners(id, v) => {
+                if let Some(manager) = self.corner_radius_manager.as_ref() {
+                    if let Some(w) = self.windows.iter_mut().find(|w| w.id == id) {
+                        if let Some(radii) = v {
+                            if let Some((protocol_object, corner_radii)) = w.corner_radius.as_mut() {
+                                if *corner_radii != radii {
+                                    protocol_object.0.0.set_radius(radii.top_left,
+                                    radii.top_right,
+                                    radii.bottom_right,
+                                    radii.bottom_left,);
+                                    *corner_radii = radii.clone();
+                                }
+                            } else {
+                                let toplevel = w.xdg_toplevel(&self.connection);
+
+                                let protocol_object = manager.get_corner_radius(&toplevel, &self.queue_handle, ());
+                                protocol_object.set_radius(
+                                    radii.top_left,
+                                    radii.top_right,
+                                    radii.bottom_right,
+                                    radii.bottom_left,
+                                );
+                                w.corner_radius = Some((SctkCornerRadius(Arc::new(MyCosmicCornerRadiusToplevelV1( protocol_object))), radii.clone()));
+                            }
+                        } else {
+                            if let Some(old) = w.corner_radius.take() {
+                                old.0.0.as_ref().0.unset_radius();
+                            }
+                            w.corner_radius = None;
+                        }
+                    } else {
+                        if let Some(v) = v{
+                            _ = self.pending_corner_radius.insert(id, v);
+                        } else {
+                            _ = self.pending_corner_radius.remove(&id);
+                        }
+                    }
+                }
+            }
         };
         Ok(())
     }
diff --git a/winit/src/platform_specific/wayland/handlers/mod.rs b/winit/src/platform_specific/wayland/handlers/mod.rs
index 0079299f..856c5c32 100644
--- a/winit/src/platform_specific/wayland/handlers/mod.rs
+++ b/winit/src/platform_specific/wayland/handlers/mod.rs
@@ -11,14 +11,14 @@ pub mod toplevel;
 pub mod wp_fractional_scaling;
 pub mod wp_viewporter;
 
-use cctk::sctk::{
+use cctk::{sctk::{
     delegate_registry, delegate_shm,
     output::OutputState,
     registry::{ProvidesRegistryState, RegistryState},
     registry_handlers,
     seat::SeatState,
     shm::{Shm, ShmHandler},
-};
+}};
 
 use crate::platform_specific::wayland::event_loop::state::SctkState;
 
diff --git a/winit/src/platform_specific/wayland/handlers/seat/keyboard.rs b/winit/src/platform_specific/wayland/handlers/seat/keyboard.rs
index b587a365..5ff7fb4b 100644
--- a/winit/src/platform_specific/wayland/handlers/seat/keyboard.rs
+++ b/winit/src/platform_specific/wayland/handlers/seat/keyboard.rs
@@ -2,11 +2,11 @@ use crate::platform_specific::wayland::{
     event_loop::state::SctkState,
     sctk_event::{KeyboardEventVariant, SctkEvent},
 };
-use cctk::sctk::reexports::client::Proxy;
 use cctk::sctk::{
     delegate_keyboard,
     seat::keyboard::{KeyboardHandler, Keysym},
 };
+use cctk::sctk::{reexports::client::Proxy, seat::keyboard::RawModifiers};
 
 impl KeyboardHandler for SctkState {
     fn enter(
@@ -232,7 +232,8 @@ impl KeyboardHandler for SctkState {
         keyboard: &cctk::sctk::reexports::client::protocol::wl_keyboard::WlKeyboard,
         _serial: u32,
         modifiers: cctk::sctk::seat::keyboard::Modifiers,
-        layout: u32,
+        _raw_modifiers: RawModifiers,
+        _layout: u32,
     ) {
         let (is_active, my_seat) =
             match self.seats.iter_mut().enumerate().find_map(|(i, s)| {
@@ -268,6 +269,17 @@ impl KeyboardHandler for SctkState {
             }
         }
     }
+
+    fn repeat_key(
+        &mut self,
+        _conn: &wayland_client::Connection,
+        _qh: &wayland_client::QueueHandle<Self>,
+        _keyboard: &wayland_client::protocol::wl_keyboard::WlKeyboard,
+        _serial: u32,
+        _event: cctk::sctk::seat::keyboard::KeyEvent,
+    ) {
+        // TODO
+    }
 }
 
 delegate_keyboard!(SctkState);
diff --git a/winit/src/platform_specific/wayland/handlers/shell/corner_radius.rs b/winit/src/platform_specific/wayland/handlers/shell/corner_radius.rs
new file mode 100644
index 00000000..bd7d2409
--- /dev/null
+++ b/winit/src/platform_specific/wayland/handlers/shell/corner_radius.rs
@@ -0,0 +1,45 @@
+use cctk::{sctk, cosmic_protocols::{
+    corner_radius::v1::client::{
+        cosmic_corner_radius_manager_v1::CosmicCornerRadiusManagerV1,
+        cosmic_corner_radius_toplevel_v1::CosmicCornerRadiusToplevelV1,
+    },
+    overlap_notify::v1::client::zcosmic_overlap_notification_v1::ZcosmicOverlapNotificationV1,
+}};
+use sctk::reexports::{
+    client::{Connection, Dispatch, Proxy},
+
+};
+
+use crate::event_loop::state::SctkState;
+use crate::platform_specific::wayland::SctkEvent;
+
+impl Dispatch<CosmicCornerRadiusManagerV1, ()> for SctkState {
+    fn event(
+        _state: &mut Self,
+        _proxy: &CosmicCornerRadiusManagerV1,
+        _event: <CosmicCornerRadiusManagerV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &Connection,
+        _qhandle: &sctk::reexports::client::QueueHandle<Self>,
+    ) {}
+}
+
+impl
+    Dispatch<
+        CosmicCornerRadiusToplevelV1,
+        (),
+    > for SctkState
+{
+    fn event(
+        state: &mut Self,
+        _proxy: &CosmicCornerRadiusToplevelV1,
+        event: <CosmicCornerRadiusToplevelV1 as Proxy>::Event,
+        _data: &(),
+        _conn: &Connection,
+        _qhandle: &sctk::reexports::client::QueueHandle<Self>,
+    ) {
+        match event {
+            _ => unimplemented!()
+        }
+    }
+}
diff --git a/winit/src/platform_specific/wayland/handlers/shell/mod.rs b/winit/src/platform_specific/wayland/handlers/shell/mod.rs
index 5556c08d..af8b5961 100644
--- a/winit/src/platform_specific/wayland/handlers/shell/mod.rs
+++ b/winit/src/platform_specific/wayland/handlers/shell/mod.rs
@@ -1,3 +1,4 @@
 pub mod layer;
 pub mod xdg_popup;
 pub mod xdg_window;
+pub mod corner_radius;