diff --git a/conf/.env b/conf/.env
index ccd91fe0..378734cb 100644
--- a/conf/.env
+++ b/conf/.env
@@ -1,6 +1,6 @@
 APP_NAME=__APP__
 APP_ENV=production
-APP_KEY=
+APP_KEY=__APP_KEY__
 APP_DEBUG=true
 APP_URL=https://__DOMAIN__
 
diff --git a/scripts/install b/scripts/install
index 4c263969..63381d08 100644
--- a/scripts/install
+++ b/scripts/install
@@ -23,6 +23,7 @@ ynh_abort_if_errors
 domain=$YNH_APP_ARG_DOMAIN
 path_url="/"
 is_public=$YNH_APP_ARG_IS_PUBLIC
+app_key=$(ynh_string_random --length=32)
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -44,6 +45,7 @@ ynh_webpath_register "$app" "$domain" "$path_url"
 ynh_app_setting_set "$app" domain "$domain"
 ynh_app_setting_set "$app" path "$path_url"
 ynh_app_setting_set "$app" is_public "$is_public"
+ynh_app_setting_set "$app" app_key "$app_key"
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -129,6 +131,7 @@ config="$final_path/.env"
 cp ../conf/.env "$config"
 
 ynh_replace_string "__APP__"     "$app"      "$config"
+ynh_replace_string "__APP_KEY__"     "$app_key"      "$config"
 ynh_replace_string "__DOMAIN__"  "$domain"   "$config"
 ynh_replace_string "__PATH__"    "$path_url" "$config"
 ynh_replace_string "__DB_NAME__" "$db_name"  "$config"