diff --git a/src/bimap.rs b/src/bimap.rs
index 9ea311a..9d0a96c 100644
--- a/src/bimap.rs
+++ b/src/bimap.rs
@@ -2,6 +2,7 @@ use std::{collections::HashMap, hash::Hash};
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>\\
 
+#[derive(Debug)]
 pub struct Bimap<V: Eq + Hash, Λ: Eq + Hash> {
     pub mλ: HashMap<V, Λ>,
     pub my: HashMap<Λ, V>,
diff --git a/src/dict.rs b/src/dict.rs
index 4d5b35b..67e22b3 100644
--- a/src/dict.rs
+++ b/src/dict.rs
@@ -28,6 +28,7 @@ pub trait TypeDict {
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>\\
 
+#[derive(Debug)]
 pub struct BimapTypeDict {
     typenames: Bimap<String, TypeID>,
     type_lit_counter: u64,