diff --git a/composer.json b/composer.json
index 7632d39..0c4114d 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
         "symfony/event-dispatcher": "5.4.*",
         "symfony/expression-language": "5.4.*",
         "symfony/finder": "5.4.*",
-        "symfony/flex": "^1.3.1",
+        "symfony/flex": "^2.2",
         "symfony/form": "5.4.*",
         "symfony/framework-bundle": "5.4.*",
         "symfony/http-client": "5.4.*",
@@ -60,7 +60,8 @@
         "symfony/webpack-encore-bundle": "^1.11",
         "symfony/yaml": "5.4.*",
         "twig/extra-bundle": "^2.12|^3.3",
-        "twig/twig": "^2.12|^3.3"
+        "twig/twig": "^2.12|^3.3",
+        "symfony/runtime": "^5.4"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/core/Resources/views/admin/module/metas.html.twig b/src/core/Resources/views/admin/module/metas.html.twig
index bcbdcf3..dfa4845 100644
--- a/src/core/Resources/views/admin/module/metas.html.twig
+++ b/src/core/Resources/views/admin/module/metas.html.twig
@@ -1,4 +1,6 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
-<link rel="shortcut icon" href="{{ asset(site_logo) }}">
-<link rel="icon" href="{{ asset(site_logo) }}">
+{% if site_logo is defined %}
+    <link rel="shortcut icon" href="{{ asset(site_logo) }}">
+    <link rel="icon" href="{{ asset(site_logo) }}">
+{% endif %}