diff --git a/lib/uh/wm/manager.rb b/lib/uh/wm/manager.rb
index f710f2a..393f7f8 100644
--- a/lib/uh/wm/manager.rb
+++ b/lib/uh/wm/manager.rb
@@ -78,6 +78,12 @@ module Uh
         @events.emit :unmanage, args: client
       end
 
+      def update_properties window
+        return unless client = client_for(window)
+        client.update_window_properties
+        @events.emit :change, args: client
+      end
+
       def handle_next_event
         handle @display.next_event
       end
diff --git a/spec/uh/wm/manager_spec.rb b/spec/uh/wm/manager_spec.rb
index 0098f3b..d664d8a 100644
--- a/spec/uh/wm/manager_spec.rb
+++ b/spec/uh/wm/manager_spec.rb
@@ -248,6 +248,30 @@ module Uh
         end
       end
 
+      describe '#update_properties' do
+        context 'with known window' do
+          before { manager.clients << client }
+
+          it 'tells the client to update its window properties' do
+            expect(client).to receive :update_window_properties
+            manager.update_properties window
+          end
+
+          it 'emits :change event with the client' do
+            events.on :change, &block
+            expect(block).to receive(:call).with client
+            manager.update_properties window
+          end
+        end
+
+        context 'with unknown window' do
+          it 'does not emit any event' do
+            expect(events).not_to receive :emit
+            manager.update_properties window
+          end
+        end
+      end
+
       describe '#handle_next_event' do
         it 'handles the next available event on display' do
           event = double 'event'