diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MeshIO/MeshExportUtil.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MeshIO/MeshExportUtil.cs
index b090f71ab..bc79a1fa6 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MeshIO/MeshExportUtil.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MeshIO/MeshExportUtil.cs
@@ -115,6 +115,9 @@ namespace UniGLTF
                 var indicesAccessorIndex = data.ExtendBufferAndGetAccessorIndex(indices.Select(x => (uint)m_vertexIndexMap[x]).ToArray(), glBufferTarget.ELEMENT_ARRAY_BUFFER);
                 var positions = m_positions.ToArray();
                 var positionAccessorIndex = data.ExtendBufferAndGetAccessorIndex(positions, glBufferTarget.ARRAY_BUFFER);
+                data.GLTF.accessors[positionAccessorIndex].min = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Min(a.x, b.x), Math.Min(a.y, b.y), Mathf.Min(a.z, b.z))).ToArray();
+                data.GLTF.accessors[positionAccessorIndex].max = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Max(a.x, b.x), Math.Max(a.y, b.y), Mathf.Max(a.z, b.z))).ToArray();
+
                 var normals = m_normals.ToArray();
                 var normalAccessorIndex = data.ExtendBufferAndGetAccessorIndex(normals, glBufferTarget.ARRAY_BUFFER);
                 var uvAccessorIndex0 = data.ExtendBufferAndGetAccessorIndex(m_uv.ToArray(), glBufferTarget.ARRAY_BUFFER);