diff --git a/.travis.yml b/.travis.yml
index 0756088..627d355 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,6 @@ stages:
   - test
 
 php:
-  - '7.1'
   - '7.2'
   - '7.3'
 
diff --git a/README.md b/README.md
index cea98bf..255bf6f 100644
--- a/README.md
+++ b/README.md
@@ -609,3 +609,4 @@ Author and Contributors
 * [Quang Ngo](https://github.com/vanquang9387)
 * [David Higgins](https://github.com/zoul0813)
 * [Damon Williams](https://github.com/footballencarta)
+* [David Palmer](https://github.com/dp88)
diff --git a/composer.json b/composer.json
index 521d8d2..39d8136 100644
--- a/composer.json
+++ b/composer.json
@@ -4,8 +4,8 @@
     "keywords": ["laravel", "dynamodb", "aws"],
     "require": {
         "aws/aws-sdk-php": "^3.0.0",
-        "illuminate/support": "5.1.* || 5.2.* || 5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.*",
-        "illuminate/database": "5.1.* || 5.2.* || 5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.*"
+        "illuminate/support": "5.1.* || 5.2.* || 5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || 6.0.*",
+        "illuminate/database": "5.1.* || 5.2.* || 5.3.* || 5.4.* || 5.5.* || 5.6.* || 5.7.* || 5.8.* || 6.0.*"
     },
     "license": "MIT",
     "authors": [
diff --git a/src/ConditionAnalyzer/Analyzer.php b/src/ConditionAnalyzer/Analyzer.php
index cdbb96a..9fb0740 100644
--- a/src/ConditionAnalyzer/Analyzer.php
+++ b/src/ConditionAnalyzer/Analyzer.php
@@ -5,6 +5,7 @@
 use BaoPham\DynamoDb\ComparisonOperator;
 use BaoPham\DynamoDb\DynamoDbModel;
 use BaoPham\DynamoDb\H;
+use Illuminate\Support\Arr;
 
 /**
  * Class ConditionAnalyzer
@@ -71,7 +72,7 @@ public function isExactSearch()
         }
 
         foreach ($this->conditions as $condition) {
-            if (array_get($condition, 'type') !== ComparisonOperator::EQ) {
+            if (Arr::get($condition, 'type') !== ComparisonOperator::EQ) {
                 return false;
             }
         }
@@ -173,15 +174,15 @@ private function getIndex()
         $index = null;
 
         foreach ($this->model->getDynamoDbIndexKeys() as $name => $keysInfo) {
-            $conditionKeys = array_pluck($this->conditions, 'column');
+            $conditionKeys = Arr::pluck($this->conditions, 'column');
             $keys = array_values($keysInfo);
 
             if (count(array_intersect($conditionKeys, $keys)) === count($keys)) {
                 if (!isset($this->indexName) || $this->indexName === $name) {
                     $index = new Index(
                         $name,
-                        array_get($keysInfo, 'hash'),
-                        array_get($keysInfo, 'range')
+                        Arr::get($keysInfo, 'hash'),
+                        Arr::get($keysInfo, 'range')
                     );
 
                     break;
diff --git a/src/DynamoDb/QueryBuilder.php b/src/DynamoDb/QueryBuilder.php
index bad1008..bebbf12 100644
--- a/src/DynamoDb/QueryBuilder.php
+++ b/src/DynamoDb/QueryBuilder.php
@@ -6,6 +6,7 @@
 use BadMethodCallException;
 use BaoPham\DynamoDb\DynamoDbClientInterface;
 use BaoPham\DynamoDb\RawDynamoDbQuery;
+use Illuminate\Support\Str;
 
 /**
  * Class QueryBuilder
@@ -109,7 +110,7 @@ public function prepare(DynamoDbClient $client = null)
      */
     public function __call($method, $parameters)
     {
-        if (starts_with($method, 'set')) {
+        if (Str::startsWith($method, 'set')) {
             $key = array_reverse(explode('set', $method, 2))[0];
             $this->query[$key] = current($parameters);
 
diff --git a/src/DynamoDbClientService.php b/src/DynamoDbClientService.php
index b567426..efa32df 100644
--- a/src/DynamoDbClientService.php
+++ b/src/DynamoDbClientService.php
@@ -4,6 +4,7 @@
 
 use Aws\DynamoDb\DynamoDbClient;
 use Aws\DynamoDb\Marshaler;
+use Illuminate\Support\Arr;
 use Illuminate\Support\Facades\Log;
 
 class DynamoDbClientService implements DynamoDbClientInterface
@@ -43,7 +44,7 @@ public function getClient($connection = null)
 
         $config = config("dynamodb.connections.$connection", []);
         $config['version'] = '2012-08-10';
-        $config['debug'] = $this->getDebugOptions(array_get($config, 'debug'));
+        $config['debug'] = $this->getDebugOptions(Arr::get($config, 'debug'));
 
         $client = new DynamoDbClient($config);
 
diff --git a/src/DynamoDbModel.php b/src/DynamoDbModel.php
index 658f027..abc0d84 100644
--- a/src/DynamoDbModel.php
+++ b/src/DynamoDbModel.php
@@ -5,6 +5,7 @@
 use Exception;
 use DateTime;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Arr;
 
 /**
  * Class DynamoDbModel.
@@ -183,7 +184,7 @@ public function saveAsync(array $options = [])
         $savePromise = $this->newQuery()->saveAsync();
 
         $savePromise->then(function ($result) use ($create, $options) {
-            if (array_get($result, '@metadata.statusCode') === 200) {
+            if (Arr::get($result, '@metadata.statusCode') === 200) {
                 $this->exists = true;
                 $this->wasRecentlyCreated = $create;
                 $this->fireModelEvent($create ? 'created' : 'updated', false);
@@ -446,7 +447,7 @@ public function getMarshaler()
     public function __sleep()
     {
         return array_keys(
-            array_except(get_object_vars($this), ['marshaler', 'attributeFilter'])
+            Arr::except(get_object_vars($this), ['marshaler', 'attributeFilter'])
         );
     }
 
diff --git a/src/DynamoDbQueryBuilder.php b/src/DynamoDbQueryBuilder.php
index ceef481..54e584b 100644
--- a/src/DynamoDbQueryBuilder.php
+++ b/src/DynamoDbQueryBuilder.php
@@ -10,6 +10,7 @@
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Database\Eloquent\ModelNotFoundException;
 use Illuminate\Database\Eloquent\Scope;
+use Illuminate\Support\Arr;
 
 class DynamoDbQueryBuilder
 {
@@ -470,7 +471,7 @@ public function find($id, array $columns = [])
 
         $item = $query->prepare($this->client)->getItem();
 
-        $item = array_get($item->toArray(), 'Item');
+        $item = Arr::get($item->toArray(), 'Item');
 
         if (empty($item)) {
             return null;
@@ -601,7 +602,7 @@ public function removeAttribute(...$attributes)
             ->prepare($this->client)
             ->updateItem();
 
-        $success = array_get($result, '@metadata.statusCode') === 200;
+        $success = Arr::get($result, '@metadata.statusCode') === 200;
 
         if ($success) {
             $this->model->setRawAttributes(DynamoDb::unmarshalItem($result->get('Attributes')));
@@ -618,7 +619,7 @@ public function delete()
             ->prepare($this->client)
             ->deleteItem();
 
-        return array_get($result->toArray(), '@metadata.statusCode') === 200;
+        return Arr::get($result->toArray(), '@metadata.statusCode') === 200;
     }
 
     public function deleteAsync()
@@ -638,7 +639,7 @@ public function save()
             ->prepare($this->client)
             ->putItem();
 
-        return array_get($result, '@metadata.statusCode') === 200;
+        return Arr::get($result, '@metadata.statusCode') === 200;
     }
 
     public function saveAsync()
@@ -710,7 +711,7 @@ protected function getAll(
                 $res = $this->client->query($raw->query);
             }
 
-            $this->lastEvaluatedKey = array_get($res, 'LastEvaluatedKey');
+            $this->lastEvaluatedKey = Arr::get($res, 'LastEvaluatedKey');
             $iterator = $res['Items'];
         }
 
diff --git a/src/Parsers/ConditionExpression.php b/src/Parsers/ConditionExpression.php
index 0ae0ff3..e45df64 100644
--- a/src/Parsers/ConditionExpression.php
+++ b/src/Parsers/ConditionExpression.php
@@ -5,6 +5,7 @@
 use BaoPham\DynamoDb\ComparisonOperator;
 use BaoPham\DynamoDb\NotSupportedException;
 use BaoPham\DynamoDb\Facades\DynamoDb;
+use Illuminate\Support\Arr;
 
 class ConditionExpression
 {
@@ -70,9 +71,9 @@ public function parse($where)
         $parsed = [];
 
         foreach ($where as $condition) {
-            $boolean = array_get($condition, 'boolean');
-            $value = array_get($condition, 'value');
-            $type = array_get($condition, 'type');
+            $boolean = Arr::get($condition, 'boolean');
+            $value = Arr::get($condition, 'value');
+            $type = Arr::get($condition, 'type');
 
             $prefix = '';
 
@@ -86,7 +87,7 @@ public function parse($where)
             }
 
             $parsed[] = $prefix . $this->parseCondition(
-                array_get($condition, 'column'),
+                Arr::get($condition, 'column'),
                 $type,
                 $value
             );
diff --git a/src/Parsers/KeyConditionExpression.php b/src/Parsers/KeyConditionExpression.php
index 5d7ff04..fc1b7b7 100644
--- a/src/Parsers/KeyConditionExpression.php
+++ b/src/Parsers/KeyConditionExpression.php
@@ -3,12 +3,13 @@
 namespace BaoPham\DynamoDb\Parsers;
 
 use BaoPham\DynamoDb\ComparisonOperator;
+use Illuminate\Support\Arr;
 
 class KeyConditionExpression extends ConditionExpression
 {
     protected function getSupportedOperators()
     {
-        return array_only(static::OPERATORS, [
+        return Arr::only(static::OPERATORS, [
             ComparisonOperator::EQ,
             ComparisonOperator::LE,
             ComparisonOperator::LT,
diff --git a/tests/DynamoDbCompositeModelTest.php b/tests/DynamoDbCompositeModelTest.php
index 4979c35..4523e29 100644
--- a/tests/DynamoDbCompositeModelTest.php
+++ b/tests/DynamoDbCompositeModelTest.php
@@ -6,6 +6,8 @@
 use BaoPham\DynamoDb\Facades\DynamoDb;
 use BaoPham\DynamoDb\RawDynamoDbQuery;
 use \Illuminate\Database\Eloquent\ModelNotFoundException;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Str;
 
 /**
  * Class DynamoDbCompositeModelTest
@@ -22,7 +24,7 @@ protected function getTestModel()
     public function testCreateRecord()
     {
         $this->testModel->id = 'id1';
-        $this->testModel->id2 = str_random(36);
+        $this->testModel->id2 = Str::random(36);
         $this->testModel->name = 'Test Create';
         $this->testModel->count = 1;
         $this->testModel->save();
@@ -45,7 +47,7 @@ public function testCreateRecord()
     public function testCreateAsyncRecord()
     {
         $this->testModel->id = 'id1';
-        $this->testModel->id2 = str_random(36);
+        $this->testModel->id2 = Str::random(36);
         $this->testModel->name = 'Test Create Async';
         $this->testModel->count = 1;
         $this->testModel->saveAsync()->wait();
@@ -68,9 +70,9 @@ public function testCreateAsyncRecord()
     public function testFindRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $item = $this->testModel->find(['id' => $seedId, 'id2' => $seedId2]);
 
@@ -111,9 +113,9 @@ public function testFindMultiple()
     public function testFindOrFailRecordPass()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $item = $this->testModel->findOrFail(['id' => $seedId, 'id2' => $seedId2]);
 
@@ -146,9 +148,9 @@ public function testFindOrFailMultiple()
     public function testFirstOrFailRecordPass()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $query = $this->testModel
             ->where('id', $seedId)
@@ -180,8 +182,8 @@ public function testFirstOrFailRecordFail()
     public function testUpdateRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $newName = 'New Name';
         $this->testModel = $this->testModel->find(['id' => $seedId, 'id2' => $seedId2]);
@@ -199,14 +201,14 @@ public function testUpdateRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testUpdateAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $newName = 'New Name';
         $this->testModel = $this->testModel->find(['id' => $seedId, 'id2' => $seedId2]);
@@ -222,14 +224,14 @@ public function testUpdateAsyncRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testSaveRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $newName = 'New Name to be saved';
         $this->testModel = $this->testModel->find(['id' => $seedId, 'id2' => $seedId2]);
@@ -247,14 +249,14 @@ public function testSaveRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testSaveAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $newName = 'New Name to be saved asynchronously';
         $this->testModel = $this->testModel->find(['id' => $seedId, 'id2' => $seedId2]);
@@ -272,14 +274,14 @@ public function testSaveAsyncRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testDeleteRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $this->testModel->find(['id' => $seedId, 'id2' => $seedId2])->delete();
 
@@ -299,8 +301,8 @@ public function testDeleteRecord()
     public function testDeleteAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedId2 = array_get($seed, 'id2.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedId2 = Arr::get($seed, 'id2.S');
 
         $this->testModel->find(['id' => $seedId, 'id2' => $seedId2])->deleteAsync()->wait();
 
@@ -451,7 +453,7 @@ public function testSetIndexManually()
             ->withIndex('id_author_index')
             ->toDynamoDbQuery();
 
-        $this->assertEquals('id_author_index', array_get($raw->query, 'IndexName'));
+        $this->assertEquals('id_author_index', Arr::get($raw->query, 'IndexName'));
         $this->assertEquals('Query', $raw->op);
     }
 
@@ -756,11 +758,11 @@ public function seed($attributes = [], $exclude = [])
     {
         $item = [
             'id' => ['S' => 'id1'],
-            'id2' => ['S' => str_random(36)],
-            'name' => ['S' => str_random(36)],
-            'description' => ['S' => str_random(256)],
+            'id2' => ['S' => Str::random(36)],
+            'name' => ['S' => Str::random(36)],
+            'description' => ['S' => Str::random(256)],
             'count' => ['N' => rand()],
-            'author' => ['S' => str_random()],
+            'author' => ['S' => Str::random()],
             'nested' => [
                 'M' => [
                     'foo' => ['S' => 'bar'],
@@ -777,7 +779,7 @@ public function seed($attributes = [], $exclude = [])
         ];
 
         $item = array_merge($item, $attributes);
-        $item = array_except($item, $exclude);
+        $item = Arr::except($item, $exclude);
 
         $this->getClient()->putItem([
             'TableName' => $this->testModel->getTable(),
diff --git a/tests/DynamoDbNonCompositeModelTest.php b/tests/DynamoDbNonCompositeModelTest.php
index d5b8825..13f1ff0 100644
--- a/tests/DynamoDbNonCompositeModelTest.php
+++ b/tests/DynamoDbNonCompositeModelTest.php
@@ -5,6 +5,8 @@
 use BaoPham\DynamoDb\DynamoDbModel;
 use BaoPham\DynamoDb\RawDynamoDbQuery;
 use \Illuminate\Database\Eloquent\ModelNotFoundException;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Str;
 
 /**
  * Class DynamoDbNonCompositeModelTest
@@ -20,7 +22,7 @@ protected function getTestModel()
 
     public function testCreateRecord()
     {
-        $this->testModel->id = str_random(36);
+        $this->testModel->id = Str::random(36);
         $this->testModel->name = 'Test Create';
         $this->testModel->count = 1;
         $this->testModel->save();
@@ -40,7 +42,7 @@ public function testCreateRecord()
 
     public function testCreateAsyncRecord()
     {
-        $this->testModel->id = str_random(36);
+        $this->testModel->id = Str::random(36);
         $this->testModel->name = 'Test Create Async';
         $this->testModel->count = 1;
         $this->testModel->saveAsync()->wait();
@@ -61,8 +63,8 @@ public function testCreateAsyncRecord()
     public function testFindRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $item = $this->testModel->find($seedId);
 
@@ -95,8 +97,8 @@ public function testFindMultiple()
     public function testFindOrFailRecordPass()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $item = $this->testModel->findOrFail($seedId);
 
@@ -121,8 +123,8 @@ public function testFindOrFailMultiple()
     public function testFirstOrFailRecordPass()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
-        $seedName = array_get($seed, 'name.S');
+        $seedId = Arr::get($seed, 'id.S');
+        $seedName = Arr::get($seed, 'name.S');
 
         $query = $this->testModel
             ->where('id', $seedId);
@@ -161,7 +163,7 @@ public function testGetAllRecords()
     public function testUpdateRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $newName = 'New Name';
         $this->testModel = $this->testModel->find($seedId);
@@ -178,13 +180,13 @@ public function testUpdateRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testUpdateAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $newName = 'New Name';
         $this->testModel = $this->testModel->find($seedId);
@@ -199,13 +201,13 @@ public function testUpdateAsyncRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testSaveRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $newName = 'New Name to be saved';
         $this->testModel = $this->testModel->find($seedId);
@@ -222,13 +224,13 @@ public function testSaveRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testSaveAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $newName = 'New Name to be saved asynchronously';
         $this->testModel = $this->testModel->find($seedId);
@@ -245,13 +247,13 @@ public function testSaveAsyncRecord()
 
         $record = $this->getClient()->getItem($query)->toArray();
 
-        $this->assertEquals($newName, array_get($record, 'Item.name.S'));
+        $this->assertEquals($newName, Arr::get($record, 'Item.name.S'));
     }
 
     public function testDeleteRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $this->testModel->find($seedId)->delete();
 
@@ -270,7 +272,7 @@ public function testDeleteRecord()
     public function testDeleteAsyncRecord()
     {
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $this->testModel->find($seedId)->deleteAsync()->wait();
 
@@ -492,7 +494,7 @@ public function testGetFirstRecord()
 
         $items = $this->testModel->first();
 
-        $this->assertEquals(array_get($firstItem, 'id.S'), $items->id);
+        $this->assertEquals(Arr::get($firstItem, 'id.S'), $items->id);
     }
 
     public function testChainedMethods()
@@ -1194,11 +1196,11 @@ protected function assertRemoveAttributes($item)
     public function seed($attributes = [], $exclude = [])
     {
         $item = [
-            'id' => ['S' => str_random(36)],
-            'name' => ['S' => str_random(36)],
-            'description' => ['S' => str_random(256)],
+            'id' => ['S' => Str::random(36)],
+            'name' => ['S' => Str::random(36)],
+            'description' => ['S' => Str::random(256)],
             'count' => ['N' => rand()],
-            'author' => ['S' => str_random()],
+            'author' => ['S' => Str::random()],
             'nested' => [
                 'M' => [
                     'foo' => ['S' => 'bar'],
@@ -1215,7 +1217,7 @@ public function seed($attributes = [], $exclude = [])
         ];
 
         $item = array_merge($item, $attributes);
-        $item = array_except($item, $exclude);
+        $item = Arr::except($item, $exclude);
 
         $this->getClient()->putItem([
             'TableName' => $this->testModel->getTable(),
diff --git a/tests/DynamoDbQueryScopeTest.php b/tests/DynamoDbQueryScopeTest.php
index b8cafa4..21a827f 100644
--- a/tests/DynamoDbQueryScopeTest.php
+++ b/tests/DynamoDbQueryScopeTest.php
@@ -3,6 +3,7 @@
 namespace BaoPham\DynamoDb\Tests;
 
 use BaoPham\DynamoDb\DynamoDbQueryBuilder;
+use Illuminate\Support\Str;
 
 /**
  * Class DynamoDbQueryScopeTest
@@ -114,11 +115,11 @@ public function testChunkWithDynamicLocalScope()
     public function seed($attributes = [])
     {
         $item = [
-            'id' => ['S' => str_random(36)],
-            'name' => ['S' => str_random(36)],
-            'description' => ['S' => str_random(256)],
+            'id' => ['S' => Str::random(36)],
+            'name' => ['S' => Str::random(36)],
+            'description' => ['S' => Str::random(256)],
             'count' => ['N' => rand()],
-            'author' => ['S' => str_random()],
+            'author' => ['S' => Str::random()],
         ];
 
         $item = array_merge($item, $attributes);
diff --git a/tests/DynamoDbTimestampTest.php b/tests/DynamoDbTimestampTest.php
index 74344f4..8353abe 100644
--- a/tests/DynamoDbTimestampTest.php
+++ b/tests/DynamoDbTimestampTest.php
@@ -3,6 +3,8 @@
 namespace BaoPham\DynamoDb\Tests;
 
 use Carbon\Carbon;
+use Illuminate\Support\Arr;
+use Illuminate\Support\Str;
 
 /**
  * Class DynamoDbTimestampTest
@@ -20,7 +22,7 @@ public function testCreateRecord()
     {
         Carbon::setTestNow(Carbon::create(2017, 06, 24, 5, 30, 0));
         $now = new Carbon;
-        $this->testModel->id = str_random(36);
+        $this->testModel->id = Str::random(36);
         $this->testModel->name = 'Test Create';
         $this->testModel->count = 1;
         $this->testModel->save();
@@ -43,7 +45,7 @@ public function testUpdateRecord()
         Carbon::setTestNow(Carbon::create(2017, 03, 01, 8, 30, 0));
         $now = new Carbon();
         $seed = $this->seed();
-        $seedId = array_get($seed, 'id.S');
+        $seedId = Arr::get($seed, 'id.S');
 
         $newName = 'New Name';
         $model = $this->testModel->find($seedId);
@@ -67,11 +69,11 @@ public function testUpdateRecord()
     public function seed($attributes = [])
     {
         $item = [
-            'id' => ['S' => str_random(36)],
-            'name' => ['S' => str_random(36)],
-            'description' => ['S' => str_random(256)],
+            'id' => ['S' => Str::random(36)],
+            'name' => ['S' => Str::random(36)],
+            'description' => ['S' => Str::random(256)],
             'count' => ['N' => rand()],
-            'author' => ['S' => str_random()],
+            'author' => ['S' => Str::random()],
         ];
 
         $item = array_merge($item, $attributes);
diff --git a/tests/Parsers/ConditionExpressionTest.php b/tests/Parsers/ConditionExpressionTest.php
index aa933f3..021bcab 100644
--- a/tests/Parsers/ConditionExpressionTest.php
+++ b/tests/Parsers/ConditionExpressionTest.php
@@ -8,6 +8,7 @@
 use BaoPham\DynamoDb\Parsers\ExpressionAttributeValues;
 use BaoPham\DynamoDb\Parsers\Placeholder;
 use PHPUnit\Framework\TestCase;
+use Illuminate\Support\Arr;
 
 class ConditionExpressionTest extends TestCase
 {
@@ -156,7 +157,7 @@ public function testParse()
         $this->assertEquals(['BOOL' => true], $this->values->get(':a13'));
         $this->assertEquals(['S' => 'android'], $this->values->get(':a14'));
 
-        $columns = array_filter(array_pluck($where, 'column'));
+        $columns = array_filter(Arr::pluck($where, 'column'));
 
         foreach ($columns as $column) {
             $this->assertEquals($column, $this->names->get("#{$column}"));