diff --git a/bindings/python/Cargo.toml b/bindings/python/Cargo.toml
index 8a81ac3d2..b494e4085 100644
--- a/bindings/python/Cargo.toml
+++ b/bindings/python/Cargo.toml
@@ -18,7 +18,6 @@ pyo3 = { version = "0.21" }
 numpy = "0.21"
 ndarray = "0.15"
 itertools = "0.12"
-serde_pyo3 = { git = "https://github.com/Narsil/serde_pyo3" }
 
 [dependencies.tokenizers]
 path = "../../tokenizers"
diff --git a/bindings/python/src/decoders.rs b/bindings/python/src/decoders.rs
index 4a4af94dd..ed21f3469 100644
--- a/bindings/python/src/decoders.rs
+++ b/bindings/python/src/decoders.rs
@@ -29,8 +29,8 @@ use super::error::ToPyResult;
 /// a Decoder will return an instance of this class when instantiated.
 #[pyclass(dict, module = "tokenizers.decoders", name = "Decoder", subclass)]
 #[derive(Clone, Deserialize, Serialize)]
-#[serde(transparent)]
 pub struct PyDecoder {
+    #[serde(flatten)]
     pub(crate) decoder: PyDecoderWrapper,
 }
 
diff --git a/bindings/python/src/models.rs b/bindings/python/src/models.rs
index 2bfaafd34..bffa1bc21 100644
--- a/bindings/python/src/models.rs
+++ b/bindings/python/src/models.rs
@@ -26,8 +26,8 @@ use super::error::{deprecation_warning, ToPyResult};
 /// This class cannot be constructed directly. Please use one of the concrete models.
 #[pyclass(module = "tokenizers.models", name = "Model", subclass)]
 #[derive(Clone, Serialize, Deserialize)]
-#[serde(transparent)]
 pub struct PyModel {
+    #[serde(flatten)]
     pub model: Arc<RwLock<ModelWrapper>>,
 }
 
diff --git a/bindings/python/src/normalizers.rs b/bindings/python/src/normalizers.rs
index 724e79b85..864947e39 100644
--- a/bindings/python/src/normalizers.rs
+++ b/bindings/python/src/normalizers.rs
@@ -44,8 +44,8 @@ impl PyNormalizedStringMut<'_> {
 /// Normalizer will return an instance of this class when instantiated.
 #[pyclass(dict, module = "tokenizers.normalizers", name = "Normalizer", subclass)]
 #[derive(Clone, Serialize, Deserialize)]
-#[serde(transparent)]
 pub struct PyNormalizer {
+    #[serde(flatten)]
     pub(crate) normalizer: PyNormalizerTypeWrapper,
 }
 
diff --git a/bindings/python/src/pre_tokenizers.rs b/bindings/python/src/pre_tokenizers.rs
index a9060ec3b..a2bd9b39c 100644
--- a/bindings/python/src/pre_tokenizers.rs
+++ b/bindings/python/src/pre_tokenizers.rs
@@ -35,8 +35,8 @@ use super::utils::*;
     subclass
 )]
 #[derive(Clone, Serialize, Deserialize)]
-#[serde(transparent)]
 pub struct PyPreTokenizer {
+    #[serde(flatten)]
     pub(crate) pretok: PyPreTokenizerTypeWrapper,
 }
 
diff --git a/bindings/python/src/processors.rs b/bindings/python/src/processors.rs
index aceb1d446..c46d8ea49 100644
--- a/bindings/python/src/processors.rs
+++ b/bindings/python/src/processors.rs
@@ -28,8 +28,8 @@ use tokenizers as tk;
     subclass
 )]
 #[derive(Clone, Deserialize, Serialize)]
-#[serde(transparent)]
 pub struct PyPostProcessor {
+    #[serde(flatten)]
     pub processor: Arc<PostProcessorWrapper>,
 }
 
diff --git a/bindings/python/src/tokenizer.rs b/bindings/python/src/tokenizer.rs
index 5bc57f777..1c6bc9cc1 100644
--- a/bindings/python/src/tokenizer.rs
+++ b/bindings/python/src/tokenizer.rs
@@ -1,4 +1,3 @@
-use serde::Serialize;
 use std::collections::{hash_map::DefaultHasher, HashMap};
 use std::hash::{Hash, Hasher};
 
@@ -463,8 +462,7 @@ type Tokenizer = TokenizerImpl<PyModel, PyNormalizer, PyPreTokenizer, PyPostProc
 ///         The core algorithm that this :obj:`Tokenizer` should be using.
 ///
 #[pyclass(dict, module = "tokenizers", name = "Tokenizer")]
-#[derive(Clone, Serialize)]
-#[serde(transparent)]
+#[derive(Clone)]
 pub struct PyTokenizer {
     tokenizer: Tokenizer,
 }
@@ -640,11 +638,6 @@ impl PyTokenizer {
         ToPyResult(self.tokenizer.save(path, pretty)).into()
     }
 
-    #[pyo3(signature = ())]
-    fn repr(&self) -> PyResult<String> {
-        serde_pyo3::to_string(self).map_err(|e| exceptions::PyException::new_err(e.to_string()))
-    }
-
     /// Return the number of special tokens that would be added for single/pair sentences.
     /// :param is_pair: Boolean indicating if the input would be a single sentence or a pair
     /// :return:
@@ -1441,16 +1434,4 @@ mod test {
 
         Tokenizer::from_file(&tmp).unwrap();
     }
-
-    #[test]
-    fn serde_pyo3() {
-        let mut tokenizer = Tokenizer::new(PyModel::from(BPE::default()));
-        tokenizer.with_normalizer(PyNormalizer::new(PyNormalizerTypeWrapper::Sequence(vec![
-            Arc::new(RwLock::new(NFKC.into())),
-            Arc::new(RwLock::new(Lowercase.into())),
-        ])));
-
-        let output = serde_pyo3::to_string(&tokenizer).unwrap();
-        assert_eq!(output, "");
-    }
 }
diff --git a/bindings/python/src/trainers.rs b/bindings/python/src/trainers.rs
index cbce2aef9..716e4cfeb 100644
--- a/bindings/python/src/trainers.rs
+++ b/bindings/python/src/trainers.rs
@@ -16,8 +16,8 @@ use tokenizers as tk;
 /// Trainer will return an instance of this class when instantiated.
 #[pyclass(module = "tokenizers.trainers", name = "Trainer", subclass)]
 #[derive(Clone, Deserialize, Serialize)]
-#[serde(transparent)]
 pub struct PyTrainer {
+    #[serde(flatten)]
     pub trainer: Arc<RwLock<TrainerWrapper>>,
 }