diff --git a/src/util/array2d.rs b/src/util/array2d.rs
index 8d1e133..1ee2e7c 100644
--- a/src/util/array2d.rs
+++ b/src/util/array2d.rs
@@ -1,7 +1,7 @@
 use std::ops::{Index, IndexMut};
 
 /// 3D row-major dynamic array
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct Array2D<T> {
     data: Vec<T>,
     height: usize,