diff --git a/.travis.yml b/.travis.yml
index 35c5d69..3136004 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,11 +5,15 @@ php:
   - 7.0
   - 7.1
   - 7.2
+  - 7.3
+  - 7.4
+  - 8.0
   - nightly
 
 matrix:
     allow_failures:
         - php: nightly
+        - php: 8.0
 
 before_script:
   - composer self-update
diff --git a/composer.json b/composer.json
index 7d15cc6..943605e 100644
--- a/composer.json
+++ b/composer.json
@@ -11,8 +11,7 @@
   ],
   "require": {
     "php": ">=5.4.0",
-    "illuminate/support": "~5.0|~6.0",
-    "laravel/helpers": "^1.1"
+    "illuminate/support": "~5.0|~6.0|~7.0"
   },
   "require-dev": {
     "phpspec/phpspec": "~2.1"
diff --git a/src/Commands/MigrationMakeCommand.php b/src/Commands/MigrationMakeCommand.php
index 800d1e5..195837b 100644
--- a/src/Commands/MigrationMakeCommand.php
+++ b/src/Commands/MigrationMakeCommand.php
@@ -5,6 +5,7 @@
 use Illuminate\Console\Command;
 use Illuminate\Container\Container;
 use Illuminate\Filesystem\Filesystem;
+use Illuminate\Support\Str;
 use Laracasts\Generators\Migrations\NameParser;
 use Laracasts\Generators\Migrations\SchemaParser;
 use Laracasts\Generators\Migrations\SyntaxBuilder;
@@ -189,7 +190,7 @@ protected function compileMigrationStub()
      */
     protected function replaceClassName(&$stub)
     {
-        $className = ucwords(camel_case($this->argument('name')));
+        $className = ucwords(Str::camel($this->argument('name')));
 
         $stub = str_replace('{{class}}', $className, $stub);
 
@@ -237,7 +238,7 @@ protected function replaceSchema(&$stub)
      */
     protected function getModelName()
     {
-        return ucwords(str_singular(camel_case($this->meta['table'])));
+        return ucwords(Str::singular(Str::camel($this->meta['table'])));
     }
 
     /**
diff --git a/src/Migrations/SchemaParser.php b/src/Migrations/SchemaParser.php
index aa8a600..a3edd1f 100644
--- a/src/Migrations/SchemaParser.php
+++ b/src/Migrations/SchemaParser.php
@@ -2,6 +2,8 @@
 
 namespace Laracasts\Generators\Migrations;
 
+use Illuminate\Support\Str;
+
 class SchemaParser
 {
     /**
@@ -104,7 +106,7 @@ private function parseOptions($options)
         if (empty($options)) return [];
 
         foreach ($options as $option) {
-            if (str_contains($option, '(')) {
+            if (Str::contains($option, '(')) {
                 preg_match('/([a-z]+)\(([^\)]+)\)/i', $option, $matches);
 
                 $results[$matches[1]] = $matches[2];