diff --git a/composer.json b/composer.json
index 6f0953ce6f0e41e73cb2b6f25ddc6769d06c4521..7e4cd2101aa4a566743e5b64eb25fa52aa052d9f 100644
--- a/composer.json
+++ b/composer.json
@@ -22,10 +22,10 @@
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8",
-        "satooshi/php-coveralls": "~1.0",
-        "squizlabs/php_codesniffer": "~2.6",
-        "friendsofphp/php-cs-fixer": "~1.12"
+        "phpunit/phpunit" : "^7.0",
+        "satooshi/php-coveralls": "~2.2",
+        "squizlabs/php_codesniffer": "~3.5",
+        "friendsofphp/php-cs-fixer": "~2.16"
     },
     "autoload": {
         "psr-4": { "jards\\gcsjardsapiclient\\Swagger\\Client\\" : "lib/" }
diff --git a/test/Api/FilesApiTest.php b/test/Api/FilesApiTest.php
index 544bbb7d8be4fc5ad78869c5575dd3b25799b79b..8629a8ba99844c2cad561b4a01539712a8b3ca51 100644
--- a/test/Api/FilesApiTest.php
+++ b/test/Api/FilesApiTest.php
@@ -41,7 +41,7 @@ use \jards\gcsjardsapiclient\Swagger\Client\ObjectSerializer;
  * @author   Swagger Codegen team
  * @link     https://github.com/swagger-api/swagger-codegen
  */
-class FilesApiTest extends \PHPUnit_Framework_TestCase
+class FilesApiTest extends \PHPUnit\Framework\TestCase
 {
 
     /**