diff --git a/.env b/.env
index b66a606..e22bcb9 100644
--- a/.env
+++ b/.env
@@ -9,6 +9,7 @@
 # Real environment variables win over .env files.
 #
 # DO NOT DEFINE PRODUCTION SECRETS IN THIS FILE NOR IN ANY OTHER COMMITTED FILES.
+# https://symfony.com/doc/current/configuration/secrets.html
 #
 # Run "composer dump-env prod" to compile .env files for production use (requires symfony/flex >=1.2).
 # https://symfony.com/doc/current/best_practices.html#use-environment-variables-for-infrastructure-configuration
diff --git a/symfony.lock b/symfony.lock
index cad3834..56ceaba 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -376,12 +376,12 @@
         "version": "v5.2.4"
     },
     "symfony/flex": {
-        "version": "1.0",
+        "version": "2.2",
         "recipe": {
             "repo": "github.com/symfony/recipes",
-            "branch": "master",
+            "branch": "main",
             "version": "1.0",
-            "ref": "c0eeb50665f0f77226616b6038a9b06c03752d8e"
+            "ref": "146251ae39e06a95be0fe3d13c807bcf3938b172"
         },
         "files": [
             ".env"