diff --git a/libs/VyfakturujAPI.class.php b/libs/VyfakturujAPI.php
similarity index 100%
rename from libs/VyfakturujAPI.class.php
rename to libs/VyfakturujAPI.php
diff --git a/libs/VyfakturujAPIException.class.php b/libs/VyfakturujAPIException.php
similarity index 100%
rename from libs/VyfakturujAPIException.class.php
rename to libs/VyfakturujAPIException.php
diff --git a/libs/VyfakturujEnum.class.php b/libs/VyfakturujEnum.php
similarity index 100%
rename from libs/VyfakturujEnum.class.php
rename to libs/VyfakturujEnum.php
diff --git a/simple-autoload.php b/simple-autoload.php
index e9c1e73..c36dcec 100644
--- a/simple-autoload.php
+++ b/simple-autoload.php
@@ -12,7 +12,7 @@
  * @see https://github.com/redbitcz/vyfakturuj-api-php/blob/master/manual-installation.md (Nápověda)
  */
 spl_autoload_register(function ($class) {
-    $file = __DIR__ . '/libs/' . $class . '.class.php';
+    $file = __DIR__ . '/libs/' . $class . '.php';
     if (file_exists($file)) {
         require $file;
     }