diff --git a/src/array.rs b/src/array.rs
index c9441093..ef82d9dd 100644
--- a/src/array.rs
+++ b/src/array.rs
@@ -1,6 +1,7 @@
+use std::fmt::Debug;
 use std::ops::{Deref, DerefMut};
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub struct Array<T, const N: usize> {
     data: [T; N],
 }
diff --git a/src/input.rs b/src/input.rs
index ba1bd41a..6baec5a4 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -36,7 +36,7 @@ pub trait Configuration: Any {
     type Fields: Send + Sync;
 
     /// A array of [`StampedValue<()>`](`StampedValue`) tuples, one per each of the value fields.
-    type Stamps: Send + Sync + DerefMut<Target = [Stamp]>;
+    type Stamps: Send + Sync + fmt::Debug + DerefMut<Target = [Stamp]>;
 }
 
 pub struct JarImpl<C: Configuration> {