diff --git a/config/filament-ptbr-form-fields.php b/config/filament-ptbr-form-fields.php
index 0b67a5f..1bb7834 100644
--- a/config/filament-ptbr-form-fields.php
+++ b/config/filament-ptbr-form-fields.php
@@ -1,3 +1,5 @@
 <?php
 
-return [];
+return [
+    'viacep_url' => env('VIACEP_URL', 'viacep.com.br/ws/'),
+];
diff --git a/src/Cep.php b/src/Cep.php
index fbd9fbf..21d5c75 100755
--- a/src/Cep.php
+++ b/src/Cep.php
@@ -19,7 +19,7 @@ public function viaCep(string $mode = 'suffix', string $errorMessage = 'CEP inv
 
             $livewire->validateOnly($component->getKey());
 
-            $request = Http::get("viacep.com.br/ws/$state/json/")->json();
+            $request = Http::get(config('filament-ptbr-form-fields.viacep_url').$state.'/json/')->json();
 
             foreach ($setFields as $key => $value) {
                 $set($key, $request[$value] ?? null);