diff --git a/composer.json b/composer.json
index 8585f01..8a75aa8 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=7.0"
+        "php": ">=7.1"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Compiler/Compiler.php b/src/Compiler/Compiler.php
index 6a587d2..28b60e4 100644
--- a/src/Compiler/Compiler.php
+++ b/src/Compiler/Compiler.php
@@ -9,7 +9,6 @@ declare(strict_types=1);
 namespace NeonXP\Dotenv\Compiler;
 
 use NeonXP\Dotenv\Exception\RuntimeException;
-use NeonXP\Dotenv\Types\KeyValue;
 
 /**
  * Class Compiler
@@ -20,61 +19,64 @@ class Compiler implements CompilerInterface
     const REGEX_VARIABLE = '/\$\{(.+?)\}/';
 
     /**
-     * @var KeyValue[]
+     * @var array[]
      */
     protected $collection = [];
 
     /**
-     * @var KeyValue[]
+     * @var array[]
      */
     protected $cache = [];
 
     /**
      * @inheritdoc
-     * @param KeyValue[] $collection
+     * @param array[] $collection
      */
     public function setRawCollection(array $collection): void
     {
         $this->collection = [];
         $this->cache = [];
-        foreach ($collection as $keyValue) {
-            $this->collection[$keyValue->getKey()] = $keyValue;
+        foreach ($collection as $array) {
+            $this->collection[$array['key']] = $array;
         }
     }
 
     /**
      * @inheritdoc
-     * @param KeyValue $keyValue
-     * @return KeyValue
+     * @param array $array
+     * @return array
      */
-    public function compileKeyValue(KeyValue $keyValue): KeyValue
+    public function compile(array $array): array
     {
-        $newValue = preg_replace_callback(self::REGEX_VARIABLE, function ($variable) use ($keyValue) {
+        $newValue = preg_replace_callback(self::REGEX_VARIABLE, function ($variable) use ($array) {
             $variable = $variable[1];
-            if ($variable === $keyValue->getKey()) {
+            if ($variable === $array['key']) {
                 throw new RuntimeException('Self referencing');
             }
             if (isset($this->cache[$variable])) {
-                return $this->cache[$variable]->getValue();
+                return $this->cache[$variable]['value'];
             } elseif (isset($this->collection[$variable]) && !$this->needToCompile($this->collection[$variable])) {
-                return $this->collection[$variable]->getValue();
+                return $this->collection[$variable]['value'];
             } elseif (isset($this->collection[$variable]) && $this->needToCompile($this->collection[$variable])) {
-                return $this->compileKeyValue($this->collection[$variable])->getValue();
+                return $this->compile($this->collection[$variable])['value'];
             }
             return "UNKNOWN VARIABLE {$variable}";
-        }, $keyValue->getValue());
-        $result = new KeyValue($keyValue->getKey(), $newValue);
-        $this->cache[$result->getKey()] = $result;
+        }, $array['value']);
+        $result = [
+            'key' => $array['key'],
+            'value' => $newValue
+        ];
+        $this->cache[$result['key']] = $result;
 
         return $result;
     }
 
     /**
-     * @param KeyValue $keyValue
+     * @param array $array
      * @return bool
      */
-    protected function needToCompile(KeyValue $keyValue): bool
+    protected function needToCompile(array $array): bool
     {
-        return !!preg_match(self::REGEX_VARIABLE, $keyValue->getValue());
+        return !!preg_match(self::REGEX_VARIABLE, $array['value']);
     }
 }
\ No newline at end of file
diff --git a/src/Compiler/CompilerInterface.php b/src/Compiler/CompilerInterface.php
index 15b6823..22daad7 100644
--- a/src/Compiler/CompilerInterface.php
+++ b/src/Compiler/CompilerInterface.php
@@ -8,8 +8,6 @@ declare(strict_types=1);
 
 namespace NeonXP\Dotenv\Compiler;
 
-use NeonXP\Dotenv\Types\KeyValue;
-
 /**
  * Interface CompilerInterface
  * @package NeonXP\Dotenv\Compiler
@@ -17,13 +15,13 @@ use NeonXP\Dotenv\Types\KeyValue;
 interface CompilerInterface
 {
     /**
-     * @param KeyValue[] $collection
+     * @param array[] $collection
      */
     public function setRawCollection(array $collection): void;
 
     /**
-     * @param KeyValue $keyValue
-     * @return KeyValue
+     * @param array $array
+     * @return array
      */
-    public function compileKeyValue(KeyValue $keyValue): KeyValue;
+    public function compile(array $array): array;
 }
\ No newline at end of file
diff --git a/src/Dotenv.php b/src/Dotenv.php
index 3f6eb90..95dda02 100644
--- a/src/Dotenv.php
+++ b/src/Dotenv.php
@@ -15,7 +15,6 @@ use NeonXP\Dotenv\Loader\FileLoader;
 use NeonXP\Dotenv\Loader\LoaderInterface;
 use NeonXP\Dotenv\Parser\Parser;
 use NeonXP\Dotenv\Parser\ParserInterface;
-use NeonXP\Dotenv\Types\KeyValue;
 
 /**
  * Class Dotenv
@@ -75,9 +74,9 @@ class Dotenv implements \ArrayAccess, \IteratorAggregate
         $rawData = array_map([$this->parser, 'parseLine'], $lines);
         $this->compiler->setRawCollection($rawData);
         $this->loadedValues = array_reduce(
-            array_map([$this->compiler, 'compileKeyValue'], $rawData),
-            function (array $acc, KeyValue $current) {
-                $acc[$current->getKey()] = $current->getValue();
+            array_map([$this->compiler, 'compile'], $rawData),
+            function (array $acc, $current) {
+                $acc[$current['key']] = $current['value'];
                 return $acc;
             },
             []
diff --git a/src/Parser/Parser.php b/src/Parser/Parser.php
index 7a5c37b..36410fc 100644
--- a/src/Parser/Parser.php
+++ b/src/Parser/Parser.php
@@ -8,8 +8,6 @@ declare(strict_types=1);
 
 namespace NeonXP\Dotenv\Parser;
 
-use NeonXP\Dotenv\Types\KeyValue;
-
 /**
  * Class Parser
  * @package NeonXP\Dotenv\Parser
@@ -28,7 +26,7 @@ class Parser implements ParserInterface
     const BOOLEAN = '/^(true|false)$/i';
     const NUMBER = '/^(\d+)$/';
 
-    public function parseLine(string $line): KeyValue
+    public function parseLine(string $line): array
     {
         $line = preg_replace(self::REGEX_EXPORT_PREFIX, '', $line);
         list($key, $value) = explode('=', $line, 2) + ['', ''];
@@ -50,6 +48,6 @@ class Parser implements ParserInterface
             $value = intval($value);
         }
 
-        return new KeyValue($key, $value);
+        return ['key' => $key, 'value' => $value];
     }
 }
\ No newline at end of file
diff --git a/src/Parser/ParserInterface.php b/src/Parser/ParserInterface.php
index f67ffb5..4e63b33 100644
--- a/src/Parser/ParserInterface.php
+++ b/src/Parser/ParserInterface.php
@@ -8,8 +8,6 @@ declare(strict_types=1);
 
 namespace NeonXP\Dotenv\Parser;
 
-use NeonXP\Dotenv\Types\KeyValue;
-
 /**
  * Interface ParserInterface
  * @package NeonXP\Dotenv\Parser
@@ -18,7 +16,7 @@ interface ParserInterface
 {
     /**
      * @param string $line
-     * @return KeyValue
+     * @return array
      */
-    public function parseLine(string $line): KeyValue;
+    public function parseLine(string $line): array;
 }
\ No newline at end of file
diff --git a/src/Types/KeyValue.php b/src/Types/KeyValue.php
deleted file mode 100644
index 54b0360..0000000
--- a/src/Types/KeyValue.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-declare(strict_types=1);
-
-/**
- * @author: Alexander Kiryukhin <alexander@kiryukhin.su>
- * @license: MIT
- */
-
-namespace NeonXP\Dotenv\Types;
-
-/**
- * Class KeyValue
- * @package NeonXP\Dotenv\Types
- */
-class KeyValue
-{
-    /**
-     * @var string
-     */
-    private $key;
-
-    /**
-     * @var string
-     */
-    private $value;
-
-    /**
-     * KeyValue constructor.
-     * @param string $key
-     * @param mixed $value
-     */
-    public function __construct(string $key, $value)
-    {
-        $this->key = $key;
-        $this->value = $value;
-    }
-
-    /**
-     * @return string
-     */
-    public function getKey(): string
-    {
-        return $this->key;
-    }
-
-    /**
-     * @return mixed
-     */
-    public function getValue()
-    {
-        return $this->value;
-    }
-}
\ No newline at end of file
diff --git a/tests/CompilerTest.php b/tests/CompilerTest.php
index 9a820ec..ed9e757 100644
--- a/tests/CompilerTest.php
+++ b/tests/CompilerTest.php
@@ -6,7 +6,6 @@ declare(strict_types=1);
  * @license: MIT
  */
 
-use NeonXP\Dotenv\Types\KeyValue;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -29,16 +28,16 @@ class CompilerTest extends TestCase
             'KEY4' => 'Test VALUE1 VALUE3 => VALUE3',
         ];
         $compiler = new \NeonXP\Dotenv\Compiler\Compiler();
-        $collectionOfKeyValues = [];
+        $collectionOfarrays = [];
         foreach ($collection as $key => $value) {
-            $collectionOfKeyValues[] = new KeyValue($key, $value);
+            $collectionOfarrays[] = ['key' => $key, 'value' => $value];
         }
-        $compiler->setRawCollection($collectionOfKeyValues);
+        $compiler->setRawCollection($collectionOfarrays);
 
         foreach ($tests as $key => $expected) {
-            $result = $compiler->compileKeyValue(new KeyValue($key, $collection[$key]));
-            $this->assertEquals($key, $result->getKey());
-            $this->assertEquals($expected, $result->getValue());
+            $result = $compiler->compile(['key' => $key, 'value' => $collection[$key]]);
+            $this->assertEquals($key, $result['key']);
+            $this->assertEquals($expected, $result['value']);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/DotenvTest.php b/tests/DotenvTest.php
index 59dd8b0..757ce70 100644
--- a/tests/DotenvTest.php
+++ b/tests/DotenvTest.php
@@ -11,7 +11,6 @@ use NeonXP\Dotenv\Dotenv;
 use NeonXP\Dotenv\Exception\RuntimeException;
 use NeonXP\Dotenv\Loader\LoaderInterface;
 use NeonXP\Dotenv\Parser\ParserInterface;
-
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -45,12 +44,8 @@ class DotenvTest extends TestCase
     {
         $dotenv = new Dotenv($this->mockLoader, $this->mockParser, $this->mockCompiler);
 
-        try {
-            $dotenv->get('TEST1');
-            $this->assertTrue(false, 'Dotenv must throws exception if it not loaded');
-        } catch (RuntimeException $exception) {
-            $this->assertTrue(true, 'Dotenv must throws exception if it not loaded');
-        }
+        $this->expectException(RuntimeException::class);
+        $dotenv->get('TEST1');
 
         $dotenv->load();
 
diff --git a/tests/ParserTest.php b/tests/ParserTest.php
index 9f13261..c67056b 100644
--- a/tests/ParserTest.php
+++ b/tests/ParserTest.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
  * @author: Alexander Kiryukhin <alexander@kiryukhin.su>
  * @license: MIT
  */
+
 use NeonXP\Dotenv\Parser\Parser;
 use PHPUnit\Framework\TestCase;
 
@@ -30,8 +31,8 @@ class ParserTest extends TestCase
 
         foreach ($tests as $test => $expected) {
             $result = $parser->parseLine($test);
-            $this->assertEquals($expected[0], $result->getKey());
-            $this->assertEquals($expected[1], $result->getValue());
+            $this->assertEquals($expected[0], $result['key']);
+            $this->assertEquals($expected[1], $result['value']);
         }
     }
 }
\ No newline at end of file
diff --git a/tests/mocks/MockCompiler.php b/tests/mocks/MockCompiler.php
index 89db68f..fced5a2 100644
--- a/tests/mocks/MockCompiler.php
+++ b/tests/mocks/MockCompiler.php
@@ -7,7 +7,6 @@ declare(strict_types=1);
  */
 
 use NeonXP\Dotenv\Compiler\CompilerInterface;
-use NeonXP\Dotenv\Types\KeyValue;
 
 /**
  * Class MockCompiler
@@ -16,7 +15,7 @@ class MockCompiler implements CompilerInterface
 {
 
     /**
-     * @param KeyValue[] $collection
+     * @param array[] $collection
      */
     function setRawCollection(array $collection): void
     {
@@ -24,11 +23,11 @@ class MockCompiler implements CompilerInterface
     }
 
     /**
-     * @param KeyValue $keyValue
-     * @return KeyValue
+     * @param array $array
+     * @return array
      */
-    function compileKeyValue(KeyValue $keyValue): KeyValue
+    function compile(array $array): array
     {
-        return $keyValue;
+        return $array;
     }
 }
\ No newline at end of file
diff --git a/tests/mocks/MockParser.php b/tests/mocks/MockParser.php
index 39c369c..d327f9f 100644
--- a/tests/mocks/MockParser.php
+++ b/tests/mocks/MockParser.php
@@ -7,7 +7,6 @@ declare(strict_types=1);
  */
 
 use NeonXP\Dotenv\Parser\ParserInterface;
-use NeonXP\Dotenv\Types\KeyValue;
 
 /**
  * Class MockParser
@@ -17,12 +16,12 @@ class MockParser implements ParserInterface
 
     /**
      * @param string $line
-     * @return KeyValue
+     * @return array
      */
-    public function parseLine(string $line): KeyValue
+    public function parseLine(string $line): array
     {
         list($key, $value) = explode("=", $line);
 
-        return new KeyValue($key, $value);
+        return ['key' => $key, 'value' => $value];
     }
 }
\ No newline at end of file