diff --git a/src/engine/io/format_traits.rs b/src/engine/io/format_traits.rs
index 0739d0c..bb7f123 100644
--- a/src/engine/io/format_traits.rs
+++ b/src/engine/io/format_traits.rs
@@ -2,3 +2,9 @@ pub mod encoded_size;
 pub use encoded_size::ConstEncodedSize;
 pub use encoded_size::EncodedSize;
 pub use encoded_size::SelfEncodedSize;
+
+pub mod parseable;
+pub use parseable::Parseable;
+
+pub mod serializable;
+pub use serializable::Serializable;