diff --git a/src/Actions/Convert/Replacer/PostAttachmentReplacer.php b/src/Actions/Convert/Replacer/PostAttachmentReplacer.php
index 912f689..c49b3c9 100644
--- a/src/Actions/Convert/Replacer/PostAttachmentReplacer.php
+++ b/src/Actions/Convert/Replacer/PostAttachmentReplacer.php
@@ -1,7 +1,8 @@
 <?php namespace WpsMcloud\Actions\Convert\Replacer;
 
-use WpsMcloud\Actions\Convert\ReplacerService;
 use WpsMcloud\Models\PostAttachment;
+use WpsMcloud\Actions\Convert\ReplacerService;
+use WpsMcloud\Exceptions\UrlDetectException;
 
 class PostAttachmentReplacer
 {
@@ -36,6 +37,20 @@ class PostAttachmentReplacer
             $post->getUrl()
         );
 
+        if ($this->mcloudPostUrl == $post->getUrl()) {
+            throw new UrlDetectException(
+                sprintf(<<<EOF
+                    Your site url has manual changed in wp-config and not appropriate with post attachments guids.
+                    Guid: %s
+                    Manual url: %s
+                    
+                    EOF,
+                    $post->getUrl(),
+                    $replacer->getUploadsDirBaseUrl()
+                )
+            );
+        }
+
         $this->mcloudPostBaseUrl = trailingslashit(
             str_replace($this->post->getBasename(), '', $this->mcloudPostUrl)
         );
diff --git a/src/Actions/Convert/ReplacerService.php b/src/Actions/Convert/ReplacerService.php
index 838b68e..f37b5f2 100644
--- a/src/Actions/Convert/ReplacerService.php
+++ b/src/Actions/Convert/ReplacerService.php
@@ -1,9 +1,9 @@
 <?php namespace WpsMcloud\Actions\Convert;
 
+use WpsMcloud\Support\Http;
+use WpsMcloud\Support\Counters;
 use WpsMcloud\Actions\Convert;
 use WpsMcloud\Models\PostAttachment;
-use WpsMcloud\Support\Counters;
-use WpsMcloud\Support\Http;
 
 class ReplacerService
 {
@@ -72,7 +72,7 @@ class ReplacerService
             $meta['sizes'] = $newSizes;
         }
 
-        update_post_meta( $post->getId(), '_wp_attachment_metadata', $meta );
+        $post->setAttachmentMetaData($meta);
 
         Counters::$processedImages++;
     }
diff --git a/src/Exceptions/UrlDetectException.php b/src/Exceptions/UrlDetectException.php
new file mode 100644
index 0000000..59d389b
--- /dev/null
+++ b/src/Exceptions/UrlDetectException.php
@@ -0,0 +1,6 @@
+<?php namespace WpsMcloud\Exceptions;
+
+class UrlDetectException extends WpstudioMediaCloudTransformException
+{
+
+}
diff --git a/src/Models/PostAttachment.php b/src/Models/PostAttachment.php
index f39d6a3..024c500 100644
--- a/src/Models/PostAttachment.php
+++ b/src/Models/PostAttachment.php
@@ -1,7 +1,5 @@
 <?php namespace WpsMcloud\Models;
 
-use JetBrains\PhpStorm\Pure;
-
 class PostAttachment
 {
     const META_KEY_FLAGGED_AS_404 = '_wp_media_cloud_transform_404';
@@ -47,7 +45,7 @@ class PostAttachment
 
     public function getBasename(): string
     {
-        return basename($this->getUrl());
+        return mb_basename($this->getUrl());
     }
 
     public function getPostMimeType(): string
@@ -57,7 +55,6 @@ class PostAttachment
 
     public function setAttachmentMetaData(array $meta)
     {
-
         update_post_meta($this->getId(), self::META_KEY_ATTACHMENT_METADATA, $meta);
     }
 
diff --git a/src/Support/helpers.php b/src/Support/helpers.php
new file mode 100644
index 0000000..8dc186f
--- /dev/null
+++ b/src/Support/helpers.php
@@ -0,0 +1,10 @@
+<?php
+
+if (!function_exists('mb_basename')) {
+    function mb_basename(string $file)
+    {
+        $filenameParts = explode('/', $file);
+
+        return end($filenameParts);
+    }
+}
diff --git a/wpstudio-media-cloud-transform.php b/wpstudio-media-cloud-transform.php
index 0c80b1e..055a2e1 100644
--- a/wpstudio-media-cloud-transform.php
+++ b/wpstudio-media-cloud-transform.php
@@ -30,6 +30,7 @@ add_action('admin_menu', fn () => add_submenu_page(
 //
 //        $ilabClassLoader = new Composer\Autoload\ClassLoader();
 //        $ilabLoader->unregister();
+        include __DIR__ . '/src/Support/helpers.php';
 
         $localVendorAutoloadPath = 'vendor/autoload.php';
         $projectVendorAutoloadPath = ABSPATH . 'vendor/autoload.php';