diff --git a/composer.json b/composer.json
index 0bc3b44..de22039 100644
--- a/composer.json
+++ b/composer.json
@@ -2,12 +2,17 @@
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   "descritpion": "An OO PHP Wrapper for tabula-java",
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-    "symfony/process": "^3.0"
+    "php": ">=5.6.0",
+    "symfony/process": "^3.0 || ^4.0"
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   "require-dev": {
     "phpunit/phpunit": "4.8.*"
   },
+  "config": {
+    "platform": {
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+    }
+  },
   "authors": [
     {
       "name": "David Madner",
@@ -18,5 +23,11 @@
     "psr-0": {
       "Davincho": "src"
     }
+  },
+
+  "autoload-dev": {
+    "psr-0": {
+      "Davincho": "test"
+    }
   }
 }
diff --git a/composer.lock b/composer.lock
index faf92e2..c04a237 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,41 +1,41 @@
 {
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-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
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-    "hash": "eb512d1e03d4a9350d863f05ea70e47f",
+    "content-hash": "cb334ff15a59fa91ef829677a76d23a0",
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@@ -53,7 +53,7 @@
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-            "time": "2015-09-19 19:59:23"
+            "time": "2018-05-16T08:49:21+00:00"
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@@ -109,41 +109,138 @@
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+            "time": "2015-06-14T21:17:01+00:00"
+        },
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+                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
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+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+                    "name": "Jaap van Otterdijk",
+                    "email": "opensource@ijaap.nl"
+                }
+            ],
+            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
+            "homepage": "http://www.phpdoc.org",
+            "keywords": [
+                "FQSEN",
+                "phpDocumentor",
+                "phpdoc",
+                "reflection",
+                "static analysis"
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+                "phpunit/phpunit": "^4.4"
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-                "erusev/parsedown": "~1.0"
+            "type": "library",
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+            "authors": [
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+                    "email": "me@mikevanriel.com"
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+        },
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+            "version": "0.4.0",
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+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
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-                    "phpDocumentor": [
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                         "src/"
                     ]
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@@ -155,37 +252,40 @@
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                     "name": "Mike van Riel",
-                    "email": "mike.vanriel@naenius.com"
+                    "email": "me@mikevanriel.com"
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-                "sebastian/comparator": "~1.1"
+                "php": "^5.3|^7.0",
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@@ -218,7 +318,7 @@
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@@ -280,20 +380,20 @@
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+            "time": "2015-10-06T15:47:00+00:00"
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@@ -327,7 +427,7 @@
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@@ -368,26 +468,34 @@
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@@ -409,20 +517,20 @@
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@@ -458,20 +566,20 @@
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@@ -485,9 +593,9 @@
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-                "phpunit/php-timer": ">=1.0.6",
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@@ -530,7 +638,7 @@
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@@ -586,26 +694,26 @@
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@@ -650,32 +758,32 @@
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@@ -698,31 +806,31 @@
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+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/be2c607e43ce4c89ecd60e75c6a85c126e754aea",
+                "reference": "be2c607e43ce4c89ecd60e75c6a85c126e754aea",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": "^5.3.3 || ^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.4"
+                "phpunit/phpunit": "^4.8 || ^5.0"
             },
             "type": "library",
             "extra": {
@@ -752,20 +860,20 @@
                 "environment",
                 "hhvm"
             ],
-            "time": "2015-08-03 06:14:51"
+            "time": "2016-08-18T05:49:44+00:00"
         },
         {
             "name": "sebastian/exporter",
-            "version": "1.2.1",
+            "version": "1.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/exporter.git",
-                "reference": "7ae5513327cb536431847bcc0c10edba2701064e"
+                "reference": "42c4c2eec485ee3e159ec9884f95b431287edde4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/7ae5513327cb536431847bcc0c10edba2701064e",
-                "reference": "7ae5513327cb536431847bcc0c10edba2701064e",
+                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/42c4c2eec485ee3e159ec9884f95b431287edde4",
+                "reference": "42c4c2eec485ee3e159ec9884f95b431287edde4",
                 "shasum": ""
             },
             "require": {
@@ -773,12 +881,13 @@
                 "sebastian/recursion-context": "~1.0"
             },
             "require-dev": {
+                "ext-mbstring": "*",
                 "phpunit/phpunit": "~4.4"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2.x-dev"
+                    "dev-master": "1.3.x-dev"
                 }
             },
             "autoload": {
@@ -818,7 +927,7 @@
                 "export",
                 "exporter"
             ],
-            "time": "2015-06-21 07:55:53"
+            "time": "2016-06-17T09:04:28+00:00"
         },
         {
             "name": "sebastian/global-state",
@@ -869,20 +978,20 @@
             "keywords": [
                 "global state"
             ],
-            "time": "2015-10-12 03:26:01"
+            "time": "2015-10-12T03:26:01+00:00"
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "1.0.1",
+            "version": "1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "994d4a811bafe801fb06dccbee797863ba2792ba"
+                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/994d4a811bafe801fb06dccbee797863ba2792ba",
-                "reference": "994d4a811bafe801fb06dccbee797863ba2792ba",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
+                "reference": "b19cc3298482a335a95f3016d2f8a6950f0fbcd7",
                 "shasum": ""
             },
             "require": {
@@ -922,7 +1031,7 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2015-06-21 08:04:50"
+            "time": "2016-10-03T07:41:43+00:00"
         },
         {
             "name": "sebastian/version",
@@ -957,38 +1066,103 @@
             ],
             "description": "Library that helps with managing the version number of Git-hosted PHP projects",
             "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2015-06-21 13:59:46"
+            "time": "2015-06-21T13:59:46+00:00"
+        },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "7cc359f1b7b80fc25ed7796be7d96adc9b354bae"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/7cc359f1b7b80fc25ed7796be7d96adc9b354bae",
+                "reference": "7cc359f1b7b80fc25ed7796be7d96adc9b354bae",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.8-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                },
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "time": "2018-04-30T19:57:29+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v2.7.5",
+            "version": "v3.4.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "31cb2ad0155c95b88ee55fe12bc7ff92232c1770"
+                "reference": "c5010cc1692ce1fa328b1fb666961eb3d4a85bb0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/31cb2ad0155c95b88ee55fe12bc7ff92232c1770",
-                "reference": "31cb2ad0155c95b88ee55fe12bc7ff92232c1770",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/c5010cc1692ce1fa328b1fb666961eb3d4a85bb0",
+                "reference": "c5010cc1692ce1fa328b1fb666961eb3d4a85bb0",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.9"
+                "php": "^5.5.9|>=7.0.8",
+                "symfony/polyfill-ctype": "~1.8"
+            },
+            "conflict": {
+                "symfony/console": "<3.4"
             },
             "require-dev": {
-                "symfony/phpunit-bridge": "~2.7"
+                "symfony/console": "~3.4|~4.0"
+            },
+            "suggest": {
+                "symfony/console": "For validating YAML files using the lint command"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.7-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
                     "Symfony\\Component\\Yaml\\": ""
-                }
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -1006,16 +1180,69 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2015-09-14 14:14:09"
+            "time": "2018-05-03T23:18:14+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
+                "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2018-01-29T19:49:41+00:00"
         }
     ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": [],
-    "prefer-stable": false,
+    "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.4.0"
+        "php": ">=5.6.0"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "platform-overrides": {
+        "php": "5.6.0"
+    }
 }
diff --git a/phpunit.xml b/phpunit.xml
index cfa393d..7d85e50 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -7,7 +7,9 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
+         bootstrap="vendor/autoload.php"
          syntaxCheck="false">
+
     <testsuites>
         <testsuite name="Application Test Suite">
             <directory>./test/</directory>
diff --git a/src/Davincho/Tabula/Tabula.php b/src/Davincho/Tabula/Tabula.php
index 99512b4..eae7aa8 100644
--- a/src/Davincho/Tabula/Tabula.php
+++ b/src/Davincho/Tabula/Tabula.php
@@ -14,7 +14,8 @@
 use Symfony\Component\Process\Exception\InvalidArgumentException;
 use Symfony\Component\Process\Exception\RuntimeException;
 use Symfony\Component\Process\ExecutableFinder;
-use Symfony\Component\Process\ProcessBuilder;
+use Symfony\Component\Process\Process;
+
 
 class Tabula
 {
@@ -145,14 +146,14 @@ public function parse($parameters = [], $file = null, $utf8Encode = true)
             array_splice( $arguments, 2, 0, '-Dfile.encoding=utf-8' );
         }
 
-        $processBuilder = new ProcessBuilder();
-        if($this->locale) {
-            $processBuilder->setEnv('LC_ALL', $this->locale);
+        $envVars = [];
+        if ($this->locale) {
+            $envVars['LC_ALL'] = $this->locale;
         }
-        $processBuilder->setPrefix($binary)
-            ->setArguments(array_merge($arguments, $parameters));
+        $process = new Process(array_merge([$binary], $arguments, $parameters), null, [
+            $envVars
+        ]);
 
-        $process = $processBuilder->getProcess();
         $process->run();
 
         if (!$process->isSuccessful()) {
diff --git a/test/ConverterTest.php b/test/Davincho/Tabula/ConverterTest.php
similarity index 87%
rename from test/ConverterTest.php
rename to test/Davincho/Tabula/ConverterTest.php
index 742d915..10c417d 100644
--- a/test/ConverterTest.php
+++ b/test/Davincho/Tabula/ConverterTest.php
@@ -1,5 +1,6 @@
 <?php
 
+namespace Davincho\Tabula;
 /*
  * This file is part of tabulapdf-php-wrapper
  *
@@ -9,7 +10,7 @@
  * file that was distributed with this source code.
  */
 
-class ConverterTest extends PHPUnit_Framework_TestCase
+class ConverterTest extends \PHPUnit\Framework\TestCase
 {
 
     /**
@@ -40,8 +41,8 @@ public function shouldParsePdfFile() {
         $result = $this->converter->parse();
         $lines = explode(PHP_EOL, $result);
 
-        $this->assertEquals('1,2', $lines[0]);
-        $this->assertEquals('9,10', $lines[4]);
+        $this->assertEquals('1,2', trim($lines[0]));
+        $this->assertEquals('9,10', trim($lines[4]));
     }
 
     /** @test */
@@ -56,7 +57,7 @@ function shouldUseParametersAccordingly() {
 
         $this->assertEquals('1,2', trim($fileContents[0]));
         $this->assertEquals('9,10', trim($fileContents[4]));
-        $this->assertNull($result);
+        $this->assertEmpty($result);
 
         unlink($output);
     }
@@ -70,8 +71,8 @@ function shouldWorkWithSpacesInFilename() {
         $result = $this->converter->parse([], $tempFile);
         $lines = explode(PHP_EOL, $result);
 
-        $this->assertEquals('1,2', $lines[0]);
-        $this->assertEquals('9,10', $lines[4]);
+        $this->assertEquals('1,2', trim($lines[0]));
+        $this->assertEquals('9,10', trim($lines[4]));
     }
 
     /**
@@ -84,6 +85,7 @@ function shouldThrowExceptionWhenProcessFails() {
 
     /**
      * @test
+     *
      */
     function shouldUseExtraDirToLookForJavaExecutable() {
 
diff --git a/test/test_1.pdf b/test/Davincho/Tabula/test_1.pdf
similarity index 100%
rename from test/test_1.pdf
rename to test/Davincho/Tabula/test_1.pdf