diff --git a/.travis.yml b/.travis.yml
index a9bf126..4092d67 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,7 +23,6 @@ before_script:
 script:
     - mkdir -p build/logs
     - vendor/bin/phpunit
-    - if [ "$dependencies" = "highest" ]; then composer require --dev phpstan/phpstan; fi;
     - if [ "$dependencies" = "highest" ]; then php vendor/bin/phpstan analyze --level=4 src tests; fi;
 
 after_script:
diff --git a/composer.json b/composer.json
index 63b4bc1..2657d59 100644
--- a/composer.json
+++ b/composer.json
@@ -20,11 +20,12 @@
     "require": {
         "php": ">=7.1.0",
         "ext-curl": "*",
-        "doctrine/inflector": "^1.0"
+        "doctrine/inflector": "^1.3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7.10",
-        "php-coveralls/php-coveralls": "^2.0"
+        "phpunit/phpunit": "^7.3.1",
+        "php-coveralls/php-coveralls": "^2.0",
+        "phpstan/phpstan": "^0.10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTrait.php b/src/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTrait.php
index c0f3f0d..8b61dfb 100644
--- a/src/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTrait.php
+++ b/src/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTrait.php
@@ -11,7 +11,6 @@
 
 use Doctrine\Common\Inflector\Inflector;
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\InvalidParamException;
-use Zend\Filter\Word\UnderscoreToCamelCase;
 
 trait ObjectHydrateHelperTrait
 {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Api/ActivityApiTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Api/ActivityApiTest.php
index 595e9a0..874d760 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Api/ActivityApiTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Api/ActivityApiTest.php
@@ -16,7 +16,7 @@
 use LooplineSystems\CloseIoApiWrapper\Library\Curl\Curl;
 use LooplineSystems\CloseIoApiWrapper\Model\SmsActivity;
 
-class ActivityApiTest extends \PHPUnit_Framework_TestCase
+class ActivityApiTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @description tests updating a sms activity using mock curl object
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Api/ConfigTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Api/ConfigTest.php
index a0de168..02c34d6 100755
--- a/tests/LooplineSystems/CloseIoApiWrapper/Api/ConfigTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Api/ConfigTest.php
@@ -12,7 +12,7 @@
 use LooplineSystems\CloseIoApiWrapper\CloseIoConfig;
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\InvalidParamException;
 
-class ConfigTest extends \PHPUnit_Framework_TestCase
+class ConfigTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @param string $url
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Api/CustomFieldApiTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Api/CustomFieldApiTest.php
index 8d09328..c0f26ce 100755
--- a/tests/LooplineSystems/CloseIoApiWrapper/Api/CustomFieldApiTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Api/CustomFieldApiTest.php
@@ -15,7 +15,7 @@
 use LooplineSystems\CloseIoApiWrapper\CloseIoResponse;
 use LooplineSystems\CloseIoApiWrapper\Model\CustomField;
 
-class CustomFieldApiTest extends \PHPUnit_Framework_TestCase
+class CustomFieldApiTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @dataProvider customFieldArrayProvider
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Api/LeadsApiTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Api/LeadsApiTest.php
index 9f9ea4c..bfe6bae 100755
--- a/tests/LooplineSystems/CloseIoApiWrapper/Api/LeadsApiTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Api/LeadsApiTest.php
@@ -14,7 +14,7 @@
 use LooplineSystems\CloseIoApiWrapper\CloseIoResponse;
 use LooplineSystems\CloseIoApiWrapper\Model\Lead;
 
-class LeadsApiTest extends \PHPUnit_Framework_TestCase
+class LeadsApiTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @param Lead $lead
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoApiWrapperTest.php b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoApiWrapperTest.php
index 9e2118d..d541bfb 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoApiWrapperTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoApiWrapperTest.php
@@ -21,7 +21,7 @@
 use LooplineSystems\CloseIoApiWrapper\CloseIoApiWrapper;
 use LooplineSystems\CloseIoApiWrapper\CloseIoConfig;
 
-class CloseIoApiWrapperTest extends \PHPUnit_Framework_TestCase
+class CloseIoApiWrapperTest extends \PHPUnit\Framework\TestCase
 {
     public function testCreateCloseIoWrapper()
     {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoConfigTest.php b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoConfigTest.php
index ef9debf..a5d8f36 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoConfigTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoConfigTest.php
@@ -12,7 +12,7 @@
 use LooplineSystems\CloseIoApiWrapper\CloseIoConfig;
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\InvalidParamException;
 
-class CloseIoConfigTest extends \PHPUnit_Framework_TestCase
+class CloseIoConfigTest extends \PHPUnit\Framework\TestCase
 {
     public function testCreateCloseIoConfigHaveValidUrlByDefault()
     {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoRequestTest.php b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoRequestTest.php
index 931dfaf..c304809 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoRequestTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoRequestTest.php
@@ -14,7 +14,7 @@
 use LooplineSystems\CloseIoApiWrapper\Library\Api\ApiHandler;
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\InvalidParamException;
 
-class CloseIoRequestTest extends \PHPUnit_Framework_TestCase
+class CloseIoRequestTest extends \PHPUnit\Framework\TestCase
 {
 
     /**
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoResponseTest.php b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoResponseTest.php
index 4c89796..a177455 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/CloseIoResponseTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/CloseIoResponseTest.php
@@ -11,7 +11,7 @@
 
 use LooplineSystems\CloseIoApiWrapper\CloseIoResponse;
 
-class CloseIoResponseTest extends \PHPUnit_Framework_TestCase
+class CloseIoResponseTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @param string $jsonResponse
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Library/Curl/CurlTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Library/Curl/CurlTest.php
index 2b7278e..6a65e78 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Library/Curl/CurlTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Library/Curl/CurlTest.php
@@ -15,7 +15,7 @@
 use LooplineSystems\CloseIoApiWrapper\Library\Curl\Curl;
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\BadApiRequestException;
 
-class CurlTest extends \PHPUnit_Framework_TestCase
+class CurlTest extends \PHPUnit\Framework\TestCase
 {
     public function testGetResponse()
     {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Library/Exception/ExceptionsTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Library/Exception/ExceptionsTest.php
index ce68e4a..0efc73f 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Library/Exception/ExceptionsTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Library/Exception/ExceptionsTest.php
@@ -11,7 +11,7 @@
 
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\JsonDecodingException;
 
-class ExceptionsTest extends \PHPUnit_Framework_TestCase
+class ExceptionsTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @param string $data
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTraitTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTraitTest.php
index 83cd02d..2558e0c 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTraitTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Library/ObjectHydrateHelperTraitTest.php
@@ -11,7 +11,7 @@
 
 use Tests\LooplineSystems\CloseIoApiWrapper\Library\Fake\ObjectHydrateHelperDemo;
 
-class ObjectHydrateHelperTraitTest extends \PHPUnit_Framework_TestCase
+class ObjectHydrateHelperTraitTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @var ObjectHydrateHelperDemo
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Model/EmailTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Model/EmailTest.php
index e177722..565fe6c 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Model/EmailTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Model/EmailTest.php
@@ -12,7 +12,7 @@
 use LooplineSystems\CloseIoApiWrapper\Library\Exception\InvalidParamException;
 use LooplineSystems\CloseIoApiWrapper\Model\Email;
 
-class EmailTest extends \PHPUnit_Framework_TestCase
+class EmailTest extends \PHPUnit\Framework\TestCase
 {
     public function testInstantiateWithoutData()
     {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Model/PhoneTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Model/PhoneTest.php
index 2eb1f24..77f72b6 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Model/PhoneTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Model/PhoneTest.php
@@ -11,7 +11,7 @@
 
 use LooplineSystems\CloseIoApiWrapper\Model\Phone;
 
-class PhoneTest extends \PHPUnit_Framework_TestCase
+class PhoneTest extends \PHPUnit\Framework\TestCase
 {
     public function testInstantiateWithoutData()
     {
diff --git a/tests/LooplineSystems/CloseIoApiWrapper/Model/UrlTest.php b/tests/LooplineSystems/CloseIoApiWrapper/Model/UrlTest.php
index d5353e6..af124cf 100644
--- a/tests/LooplineSystems/CloseIoApiWrapper/Model/UrlTest.php
+++ b/tests/LooplineSystems/CloseIoApiWrapper/Model/UrlTest.php
@@ -11,7 +11,7 @@
 
 use LooplineSystems\CloseIoApiWrapper\Model\Url;
 
-class UrlTest extends \PHPUnit_Framework_TestCase
+class UrlTest extends \PHPUnit\Framework\TestCase
 {
     public function testInstantiateWithoutData()
     {