diff --git a/lib/cyberarm_engine/ui/elements/slider.rb b/lib/cyberarm_engine/ui/elements/slider.rb
index 526c8dc..d206770 100644
--- a/lib/cyberarm_engine/ui/elements/slider.rb
+++ b/lib/cyberarm_engine/ui/elements/slider.rb
@@ -97,6 +97,8 @@ module CyberarmEngine
         position_handle
         @handle.recalculate
 
+        root.gui_state.request_repaint
+
         publish(:changed, @value)
       end
     end