diff --git a/src/visibility.rs b/src/visibility.rs
index 0fb4d66..de3d3d8 100644
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -431,7 +431,12 @@ impl<D: 'static + Clone + Default + Send + Sync> Plugin for VisibilityPlugin<D>
     fn build(&self, app: &mut App) {
         app.add_event::<VisibilityChanged>()
             .add_system(add_visibility_indices::<D>)
-            .add_system_to_stage(CoreStage::PostUpdate, update_viewshed::<D>)
+            .add_system_set_to_stage(
+                CoreStage::PostUpdate,
+                SystemSet::new()
+                    .with_run_criteria(FixedTimestep::step(0.05))
+                    .with_system(update_viewshed::<D>),
+            )
             .add_system_to_stage(CoreStage::PostUpdate, viewshed_removed)
             .add_system_to_stage(CoreStage::PostUpdate, remove_visible::<D>)
             .add_system_to_stage(CoreStage::PostUpdate, update_revealed_tiles::<D>)