diff --git a/src/main.rs b/src/main.rs
index aef0c04..a419f0e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -16,7 +16,7 @@ fn main() {
 struct Boid;
 
 #[derive(Component, Default)]
-struct Velocity(Vec3);
+struct Velocity(Vec2);
 
 #[derive(Bundle, Default)]
 struct BoidBundle {
@@ -27,7 +27,7 @@ struct BoidBundle {
 
 fn move_boids(mut boids: Query<(&mut Transform, &Velocity), With<Boid>>, time: Res<Time>) {
     for (mut transform, velocity) in &mut boids {
-        transform.translation += velocity.0 * time.delta_seconds();
+        transform.translation += velocity.0.extend(0.) * time.delta_seconds();
     }
 }
 
@@ -47,7 +47,7 @@ fn setup(
             transform: Transform::from_scale(Vec3::splat(2.5)),
             ..default()
         },
-        velocity: Velocity(Vec3::Y * 100.),
+        velocity: Velocity(Vec2::Y * 100.),
         ..default()
     });
 }