diff --git a/src/tile.rs b/src/tile.rs
index 5d20b4c..23a08fa 100644
--- a/src/tile.rs
+++ b/src/tile.rs
@@ -72,12 +72,12 @@ pub fn camera_z_movement(
     mut camera_moved: ResMut<CameraMoved>,
 ) {
     camera_moved.0 = false;
-    if keyboard_input.pressed(KeyCode::ShiftLeft) {
+    if keyboard_input.just_pressed(KeyCode::ShiftLeft) {
         z_index.0 -= 1.0;
         z_index.0 = z_index.0.clamp(-149.0, 5.0);
         camera_moved.0 = true;
     }
-    if keyboard_input.pressed(KeyCode::ShiftRight) {
+    if keyboard_input.just_pressed(KeyCode::ShiftRight) {
         z_index.0 += 1.0;
         z_index.0 = z_index.0.clamp(-149.0, 5.0);
         camera_moved.0 = true;