diff --git a/src/NgrokProcessBuilder.php b/src/NgrokProcessBuilder.php
index 3f4a78f..9001193 100644
--- a/src/NgrokProcessBuilder.php
+++ b/src/NgrokProcessBuilder.php
@@ -55,7 +55,7 @@ public function buildProcess(string $host = '', string $port = '80', string $reg
         $region = $region ? $region : env('NGROK_REGION', 'eu');
 
         if ($region) {
-            $command[] = "-region={$region}";
+            $command[] = "--region={$region}";
         }
 
         if ($host !== '') {