diff --git a/src/Bundle/ChillPersonBundle/EventListener/PersonEventListener.php b/src/Bundle/ChillPersonBundle/EventListener/PersonEventListener.php
index 68504504f..6c9b746d7 100644
--- a/src/Bundle/ChillPersonBundle/EventListener/PersonEventListener.php
+++ b/src/Bundle/ChillPersonBundle/EventListener/PersonEventListener.php
@@ -27,8 +27,7 @@ class PersonEventListener
         } elseif ($event->getObject() instanceof PersonAltName){
 
             $altname = $event->getObject();
-            $altnameCaps = mb_convert_case(mb_strtolower($altname->getLabel()), MB_CASE_TITLE, 'UTF-8');
-            $altnameCaps = ucwords(strtolower($altnameCaps), " \t\r\n\f\v'-");
+            $altnameCaps = mb_strtoupper($altname->getLabel(), 'UTF-8');
             $altname->setLabel($altnameCaps);
 
         } else {
diff --git a/src/Bundle/ChillPersonBundle/Tests/EventListener/PersonCreateEventTest.php b/src/Bundle/ChillPersonBundle/Tests/EventListener/PersonCreateEventTest.php
index 00f2e3ea8..c8690a237 100644
--- a/src/Bundle/ChillPersonBundle/Tests/EventListener/PersonCreateEventTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/EventListener/PersonCreateEventTest.php
@@ -61,10 +61,9 @@ class PersonCreateEventTest extends TestCase
 
     public function generateAltNames(): iterator
     {
-        yield ['vinCENT', 'Vincent'];
-        yield ['jean-marie', 'Jean-Marie'];
-        yield ['fastré', 'Fastré'];
-        yield ['émile', 'Émile'];
+        yield ['vinCENT', 'VINCENT'];
+        yield ['jean-marie', 'JEAN-MARIE'];
+        yield ['fastré', 'FASTRÉ'];
+        yield ['émile', 'ÉMILE'];
     }
-
 }
\ No newline at end of file