diff --git a/Source/Game/Entities/AreaTrigger/AreaTrigger.cs b/Source/Game/Entities/AreaTrigger/AreaTrigger.cs
index 12d8d2f32..5f0a5ba6c 100644
--- a/Source/Game/Entities/AreaTrigger/AreaTrigger.cs
+++ b/Source/Game/Entities/AreaTrigger/AreaTrigger.cs
@@ -430,7 +430,7 @@ namespace Game.Entities
                 extentsZ = _shape.BoxDatas.Extents[2];
             }
 
-            targetList.RemoveAll(unit => !unit.IsWithinBox(boxCenter, extentsX, extentsY, extentsZ));
+            targetList.RemoveAll(unit => !unit.IsWithinBox(boxCenter, extentsX, extentsY, extentsZ / 2));
         }
 
         void SearchUnitInPolygon(List<Unit> targetList)
diff --git a/Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs b/Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs
index 10ce73960..a81de5306 100644
--- a/Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs
+++ b/Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs
@@ -208,7 +208,7 @@ namespace Game.Entities
                 case AreaTriggerTypes.Sphere:
                     return Math.Max(SphereDatas.Radius, SphereDatas.RadiusTarget);
                 case AreaTriggerTypes.Box:
-                    return MathF.Sqrt(BoxDatas.Extents[0] * BoxDatas.Extents[0] / 4 + BoxDatas.Extents[1] * BoxDatas.Extents[1] / 4);
+                    return MathF.Sqrt(BoxDatas.Extents[0] * BoxDatas.Extents[0] + BoxDatas.Extents[1] * BoxDatas.Extents[1]);
                 case AreaTriggerTypes.Cylinder:
                     return Math.Max(CylinderDatas.Radius, CylinderDatas.RadiusTarget);
                 case AreaTriggerTypes.Disk: