diff --git a/ux.symfony.com/config/packages/ux_icons.yaml b/ux.symfony.com/config/packages/ux_icons.yaml
index 43ecf5c476d..f0bef7154d2 100644
--- a/ux.symfony.com/config/packages/ux_icons.yaml
+++ b/ux.symfony.com/config/packages/ux_icons.yaml
@@ -1,6 +1,7 @@
 ux_icons:
     default_icon_attributes:
         class: 'Icon'
+        xmlns: 'https://www.w3.org/2000/svg'
 
     icon_sets: