diff --git a/.php_cs b/.php_cs
index 417cafa..5a2dd57 100644
--- a/.php_cs
+++ b/.php_cs
@@ -7,6 +7,7 @@ return PhpCsFixer\Config::create()
         'array_syntax' => ['syntax' => 'short'],
         'blank_line_after_opening_tag' => true,
         'single_blank_line_before_namespace' => true,
+        'no_unused_imports' => true
     ])
     ->setFinder(
         PhpCsFixer\Finder::create()
diff --git a/src/Phpml/Classification/Ensemble/Bagging.php b/src/Phpml/Classification/Ensemble/Bagging.php
index d579b24..1bb2027 100644
--- a/src/Phpml/Classification/Ensemble/Bagging.php
+++ b/src/Phpml/Classification/Ensemble/Bagging.php
@@ -6,10 +6,8 @@ namespace Phpml\Classification\Ensemble;
 
 use Phpml\Helper\Predictable;
 use Phpml\Helper\Trainable;
-use Phpml\Math\Statistic\Mean;
 use Phpml\Classification\Classifier;
 use Phpml\Classification\DecisionTree;
-use Phpml\Classification\NaiveBayes;
 
 class Bagging implements Classifier
 {
diff --git a/src/Phpml/Classification/Ensemble/RandomForest.php b/src/Phpml/Classification/Ensemble/RandomForest.php
index 025badf..273eb21 100644
--- a/src/Phpml/Classification/Ensemble/RandomForest.php
+++ b/src/Phpml/Classification/Ensemble/RandomForest.php
@@ -4,9 +4,7 @@ declare(strict_types=1);
 
 namespace Phpml\Classification\Ensemble;
 
-use Phpml\Classification\Ensemble\Bagging;
 use Phpml\Classification\DecisionTree;
-use Phpml\Classification\NaiveBayes;
 use Phpml\Classification\Classifier;
 
 class RandomForest extends Bagging
diff --git a/src/Phpml/Classification/Linear/Adaline.php b/src/Phpml/Classification/Linear/Adaline.php
index 13674f1..194451a 100644
--- a/src/Phpml/Classification/Linear/Adaline.php
+++ b/src/Phpml/Classification/Linear/Adaline.php
@@ -4,10 +4,7 @@ declare(strict_types=1);
 
 namespace Phpml\Classification\Linear;
 
-use Phpml\Helper\Predictable;
-use Phpml\Helper\Trainable;
 use Phpml\Classification\Classifier;
-use Phpml\Classification\Linear\Perceptron;
 
 class Adaline extends Perceptron
 {
diff --git a/src/Phpml/Classification/Linear/Perceptron.php b/src/Phpml/Classification/Linear/Perceptron.php
index bc31da1..e2c684d 100644
--- a/src/Phpml/Classification/Linear/Perceptron.php
+++ b/src/Phpml/Classification/Linear/Perceptron.php
@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace Phpml\Classification\Linear;
 
 use Phpml\Helper\Predictable;
-use Phpml\Helper\Trainable;
 use Phpml\Classification\Classifier;
 use Phpml\Preprocessing\Normalizer;
 
diff --git a/src/Phpml/Classification/WeightedClassifier.php b/src/Phpml/Classification/WeightedClassifier.php
index 36a294e..c0ec045 100644
--- a/src/Phpml/Classification/WeightedClassifier.php
+++ b/src/Phpml/Classification/WeightedClassifier.php
@@ -1,9 +1,9 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace Phpml\Classification;
 
-use Phpml\Classification\Classifier;
-
 abstract class WeightedClassifier implements Classifier
 {
     protected $weights = null;
diff --git a/tests/Phpml/Classification/Ensemble/BaggingTest.php b/tests/Phpml/Classification/Ensemble/BaggingTest.php
index e7dfcad..002697e 100644
--- a/tests/Phpml/Classification/Ensemble/BaggingTest.php
+++ b/tests/Phpml/Classification/Ensemble/BaggingTest.php
@@ -7,7 +7,6 @@ namespace tests\Classification\Ensemble;
 use Phpml\Classification\Ensemble\Bagging;
 use Phpml\Classification\DecisionTree;
 use Phpml\Classification\NaiveBayes;
-use Phpml\Classification\KNearestNeighbors;
 use Phpml\ModelManager;
 use PHPUnit\Framework\TestCase;
 
diff --git a/tests/Phpml/Classification/Ensemble/RandomForestTest.php b/tests/Phpml/Classification/Ensemble/RandomForestTest.php
index d32507c..be587ef 100644
--- a/tests/Phpml/Classification/Ensemble/RandomForestTest.php
+++ b/tests/Phpml/Classification/Ensemble/RandomForestTest.php
@@ -7,9 +7,6 @@ namespace tests\Classification\Ensemble;
 use Phpml\Classification\Ensemble\RandomForest;
 use Phpml\Classification\DecisionTree;
 use Phpml\Classification\NaiveBayes;
-use Phpml\Classification\KNearestNeighbors;
-use Phpml\ModelManager;
-use tests\Classification\Ensemble\BaggingTest;
 
 class RandomForestTest extends BaggingTest
 {