diff --git a/frontend/ui/src/components/HeaderClock.svelte b/frontend/ui/src/components/HeaderClock.svelte
index 9ba82da9..3aadbcb0 100644
--- a/frontend/ui/src/components/HeaderClock.svelte
+++ b/frontend/ui/src/components/HeaderClock.svelte
@@ -39,9 +39,11 @@
     {:else}
         <div class="d-flex h-100 justify-content-center align-items-center">
             <ButtonGroup size="lg">
+
 	        <a
-                    href="."
+                    href="{$challengeInfo.main_link}"
                     class="btn btn-light"
+                    class:disabled={$challengeInfo.main_link === ''}
                 >
                     <Icon name="ui-checks-grid" />
 	            Accueil