diff --git a/packages/frontend/src/ui/deck.vue b/packages/frontend/src/ui/deck.vue
index a4d5087eb3..bf39c07229 100644
--- a/packages/frontend/src/ui/deck.vue
+++ b/packages/frontend/src/ui/deck.vue
@@ -225,7 +225,7 @@ function pointerEvent(ev: PointerEvent) {
 	snapScroll.value = ev.pointerType === 'touch';
 }
 
-window.document.addEventListener('pointerdown', pointerEvent);
+window.document.addEventListener('pointerdown', pointerEvent, { passive: true });
 
 function onWheel(ev: WheelEvent) {
   // WheelEvent はマウスからしか発火しないのでスナップスクロールは無効化する