diff --git a/cmnemoi_learn/__init__.py b/cmnemoi_learn/__init__.py
index e69de29..2d8d8dd 100644
--- a/cmnemoi_learn/__init__.py
+++ b/cmnemoi_learn/__init__.py
@@ -0,0 +1,6 @@
+"""
+cmnemoi-learn is a personal reimplementation of Machine Learning algorithms 
+with high quality development practices.
+"""
+
+__all__ = ["classification", "regression"]
diff --git a/cmnemoi_learn/abstract_model.py b/cmnemoi_learn/_abstract_model.py
similarity index 100%
rename from cmnemoi_learn/abstract_model.py
rename to cmnemoi_learn/_abstract_model.py
diff --git a/cmnemoi_learn/classification/__init__.py b/cmnemoi_learn/classification/__init__.py
index e69de29..77e1974 100644
--- a/cmnemoi_learn/classification/__init__.py
+++ b/cmnemoi_learn/classification/__init__.py
@@ -0,0 +1,7 @@
+"""
+Module implementing machine learning models for regression tasks.
+"""
+
+from ._logistic_regression import LogisticRegression
+
+__all__ = ["LogisticRegression"]
diff --git a/cmnemoi_learn/classification/abstract_classifier.py b/cmnemoi_learn/classification/_abstract_classifier.py
similarity index 94%
rename from cmnemoi_learn/classification/abstract_classifier.py
rename to cmnemoi_learn/classification/_abstract_classifier.py
index e688703..43a9fae 100644
--- a/cmnemoi_learn/classification/abstract_classifier.py
+++ b/cmnemoi_learn/classification/_abstract_classifier.py
@@ -4,7 +4,7 @@
 
 import numpy as np
 
-from cmnemoi_learn.abstract_model import AbstractModel
+from .._abstract_model import AbstractModel
 
 
 class AbstractClassifier(AbstractModel):
diff --git a/cmnemoi_learn/classification/logistic_regression.py b/cmnemoi_learn/classification/_logistic_regression.py
similarity index 97%
rename from cmnemoi_learn/classification/logistic_regression.py
rename to cmnemoi_learn/classification/_logistic_regression.py
index ce81555..5d3797d 100644
--- a/cmnemoi_learn/classification/logistic_regression.py
+++ b/cmnemoi_learn/classification/_logistic_regression.py
@@ -4,7 +4,7 @@
 from typing import Optional, Self
 import numpy as np
 
-from cmnemoi_learn.classification.abstract_classifier import AbstractClassifier
+from ._abstract_classifier import AbstractClassifier
 
 
 class LogisticRegression(AbstractClassifier):
diff --git a/cmnemoi_learn/regression/__init__.py b/cmnemoi_learn/regression/__init__.py
index e69de29..24a6bc8 100644
--- a/cmnemoi_learn/regression/__init__.py
+++ b/cmnemoi_learn/regression/__init__.py
@@ -0,0 +1,7 @@
+"""
+Module implementing machine learning models for regression tasks.
+"""
+
+from ._linear_regression import LinearRegression
+
+__all__ = ["LinearRegression"]
diff --git a/cmnemoi_learn/regression/abstract_regressor.py b/cmnemoi_learn/regression/_abstract_regressor.py
similarity index 92%
rename from cmnemoi_learn/regression/abstract_regressor.py
rename to cmnemoi_learn/regression/_abstract_regressor.py
index 5690ece..5e45c0d 100644
--- a/cmnemoi_learn/regression/abstract_regressor.py
+++ b/cmnemoi_learn/regression/_abstract_regressor.py
@@ -4,7 +4,7 @@
 
 import numpy as np
 
-from cmnemoi_learn.abstract_model import AbstractModel
+from .._abstract_model import AbstractModel
 
 
 class AbstractRegressor(AbstractModel):
diff --git a/cmnemoi_learn/regression/linear_regression.py b/cmnemoi_learn/regression/_linear_regression.py
similarity index 96%
rename from cmnemoi_learn/regression/linear_regression.py
rename to cmnemoi_learn/regression/_linear_regression.py
index 8e548ba..81252d1 100644
--- a/cmnemoi_learn/regression/linear_regression.py
+++ b/cmnemoi_learn/regression/_linear_regression.py
@@ -6,7 +6,7 @@
 import numpy as np
 from numpy.linalg import pinv
 
-from cmnemoi_learn.regression.abstract_regressor import AbstractRegressor
+from ._abstract_regressor import AbstractRegressor
 
 
 class LinearRegression(AbstractRegressor):
diff --git a/pyproject.toml b/pyproject.toml
index 190cac6..1364f15 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cmnemoi-learn"
-version = "0.3.0"
+version = "0.4.0"
 description = "Machine Learning from scratch by Charles-Meldhine Madi Mnemoi"
 authors = ["Charles-Meldhine Madi Mnemoi <charlesmeldhine.madimnemoi@gmail.com>"]
 license = "MIT"
diff --git a/tests/classification/test_logistic_regression.py b/tests/classification/test_logistic_regression.py
index e9f243d..b358e8e 100644
--- a/tests/classification/test_logistic_regression.py
+++ b/tests/classification/test_logistic_regression.py
@@ -6,7 +6,7 @@
 from sklearn.linear_model import LogisticRegression as SklearnLogisticRegression
 from sklearn.metrics import accuracy_score
 
-from cmnemoi_learn.classification.logistic_regression import LogisticRegression
+from cmnemoi_learn.classification import LogisticRegression
 
 RANDOM_STATE = 42
 
diff --git a/tests/regression/test_linear_regression.py b/tests/regression/test_linear_regression.py
index ac78971..e43ab1e 100644
--- a/tests/regression/test_linear_regression.py
+++ b/tests/regression/test_linear_regression.py
@@ -6,7 +6,7 @@
 from sklearn.linear_model import LinearRegression as SklearnLinearRegression
 from sklearn.metrics import mean_squared_error
 
-from cmnemoi_learn.regression.linear_regression import LinearRegression
+from cmnemoi_learn.regression import LinearRegression
 
 np.random.seed(42)