diff --git a/src/UpdateCommand.php b/src/UpdateCommand.php
index eae3f46..5e6f5ed 100644
--- a/src/UpdateCommand.php
+++ b/src/UpdateCommand.php
@@ -298,7 +298,7 @@ protected function download($version, $os)
      */
     protected function extract($version, $archive)
     {
-        $zip = new ZipArchive;
+        $zip = new ZipArchive();
 
         $zip->open($archive);
 
diff --git a/tests/UpdateTest.php b/tests/UpdateTest.php
index 0541779..ff3b680 100644
--- a/tests/UpdateTest.php
+++ b/tests/UpdateTest.php
@@ -125,7 +125,7 @@ protected function chromeVersion()
      * @param int|null $major
      * @return string
      */
-    protected function driverVersion($major = null)
+    protected function driverVersion(int $major = null)
     {
         if (is_null($major)) {
             $versions = json_decode(