diff --git a/src/classifier/lab_boosted_classifier.rs b/src/classifier/lab_boosted_classifier.rs
index 4ad8749..469dcd0 100644
--- a/src/classifier/lab_boosted_classifier.rs
+++ b/src/classifier/lab_boosted_classifier.rs
@@ -19,11 +19,13 @@
 use super::Score;
 use crate::feat::LabBoostedFeatureMap;
 
+#[derive(Clone)]
 pub struct LabBoostedClassifier {
     features: Vec<(i32, i32)>,
     base_classifiers: Vec<BaseClassifier>,
 }
 
+#[derive(Clone)]
 struct BaseClassifier {
     weights: Vec<f32>,
     thresh: f32,
diff --git a/src/classifier/mod.rs b/src/classifier/mod.rs
index 6a1eb1b..9d7a878 100644
--- a/src/classifier/mod.rs
+++ b/src/classifier/mod.rs
@@ -54,6 +54,7 @@ impl Score {
     }
 }
 
+#[derive(Clone)]
 pub enum Classifier {
     SurfMlp(SurfMlpClassifier),
     LabBoosted(LabBoostedClassifier),
diff --git a/src/classifier/surf_mlp_classifier.rs b/src/classifier/surf_mlp_classifier.rs
index 331090b..9930dd0 100644
--- a/src/classifier/surf_mlp_classifier.rs
+++ b/src/classifier/surf_mlp_classifier.rs
@@ -68,6 +68,7 @@ impl SurfMlpBuffers {
     }
 }
 
+#[derive(Clone)]
 pub struct SurfMlpClassifier {
     feature_ids: Vec<i32>,
     thresh: f32,
@@ -156,6 +157,7 @@ impl SurfMlpClassifier {
     }
 }
 
+#[derive(Clone)]
 struct Layer {
     input_dim: usize,
     output_dim: usize,
diff --git a/src/model/mod.rs b/src/model/mod.rs
index 10a124b..4ef7d25 100644
--- a/src/model/mod.rs
+++ b/src/model/mod.rs
@@ -24,6 +24,7 @@ use std::io;
 use crate::classifier::{Classifier, ClassifierKind, LabBoostedClassifier, SurfMlpClassifier};
 use byteorder::{LittleEndian, ReadBytesExt};
 
+#[derive(Clone)]
 pub struct Model {
     classifiers: Vec<Classifier>,
     wnd_src_id: Vec<Vec<i32>>,