diff --git a/README.md b/README.md
index edbd76c..841bc16 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,17 @@
 # Dofutils
 Collection of useful things to build Dofus Retro bot/emulator. \
-Written in Python3. Require Python >= 3.8. and [Poetry](https://python-poetry.org/).
+Written in Python3. Require Python >= 3.11.
 
 ## Installation
-use `poetry install dofutils`
+add dofutils in your project by using `uv add dofutils`.
 
 ## Developpement
 clone the repos using `git clone` then 
-use `poetry install` to install the dev dependencies. \
-use `poetry run task test` to launch all tests. \
-use `poetry run task lint` to format the project. \
-use `poetry run task check` to type check the project. \
-use `poetry run task clean` to clean import and var.
+use `mise install && mise run install` to install the dev dependencies. \
+use `uv run task test` to launch all tests. \
+use `uv run task lint` to format the project. \
+use `uv run task check` to type check the project. \
+use `uv run task clean` to clean import and var.
 
 ## Acknowledgement
 [Vincent Quatrevieux](https://github.com/vincent4vx) : the author of the original lib \
diff --git a/dofutils/maps/serializer.py b/dofutils/maps/serializer.py
index e8c4e15..983b086 100644
--- a/dofutils/maps/serializer.py
+++ b/dofutils/maps/serializer.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
+from typing import Self
 
 from dofutils.encoding import Base64, CheckSum, Key
 from dofutils.maps.constant import CellMovement
@@ -29,7 +30,7 @@ class InteractiveObjectData(CellLayerData):
     rotation: int = 0
 
 
-@dataclass(frozen=True)
+@dataclass(frozen=True, slots=True)
 class CellData:
     line_of_sight: bool
     movement: CellMovement
@@ -42,18 +43,21 @@ class CellData:
 class DefaultMapDataSerializer:
     cell_data_length = 10
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._cache: dict[str, CellData] | None = None
 
-    def enable_cache(self) -> None:
+    def enable_cache(self) -> Self:
         self._cache = {}
+        return self
 
-    def disable_cache(self) -> None:
+    def disable_cache(self) -> Self:
         self._cache = None
+        return self
 
     def deserialize(self, map_data: str) -> list[CellData]:
         if len(map_data) % self.cell_data_length:
             raise ValueError("Invalid map data")
+
         return [self._deserialize_cell(map_data[i : i + 10]) for i in range(0, len(map_data), 10)]
 
     def serialize(self, cells: list[CellData]) -> str:
@@ -65,6 +69,7 @@ def with_key(self, key: Key | str) -> EncryptedMapDataSerializer:
     def _deserialize_cell(self, value: str) -> CellData:
         if self._cache is not None and value in self._cache:
             return self._cache[value]
+
         d = Base64.to_bytes(value)
         cell = CellData(
             bool(d[0] & 1),
@@ -84,8 +89,10 @@ def _deserialize_cell(self, value: str) -> CellData:
                 ((d[0] & 2) << 12) + ((d[7] & 1) << 12) + (d[8] << 6) + d[9], 0, bool(d[7] & 4), bool(d[7] & 2)
             ),
         )
+
         if self._cache is not None:
             self._cache[value] = cell
+
         return cell
 
     @staticmethod