diff --git a/src/Russian/GeographicalNamesInflection.php b/src/Russian/GeographicalNamesInflection.php
index 4476249..4abd17d 100644
--- a/src/Russian/GeographicalNamesInflection.php
+++ b/src/Russian/GeographicalNamesInflection.php
@@ -29,6 +29,8 @@ class GeographicalNamesInflection extends \morphos\BaseInflection implements Cas
 
     protected static $immutableParts = [
         'санкт',
+        'йошкар',
+        'улан',
     ];
 
     protected static $runawayVowelsExceptions = [
@@ -436,4 +438,4 @@ public static function getCase($name, $case)
         $forms = self::getCases($name);
         return $forms[$case];
     }
-}
\ No newline at end of file
+}