diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 715b3ba..0103c8a 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -42,7 +42,7 @@ void Obstacle::RecalcSelfCollider()
         } else {
             self_collider2_->_min = Vector2D(0.0f - door_state1->width() / 2.0f,
                                              0.0f - door_state1->height() / 2.0f);
-            self_collider2_->_max = Vector2D(door_state1->width(), door_state1->height());
+            self_collider2_->_max = Vector2D(door_state1->width() / 2.0f, door_state1->height() / 2.0f);
         }
     } else if (meta->i->attack_type() != 2){
         switch (meta->i->type()) {