diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/.gitignore b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/.gitignore
new file mode 100644
index 0000000..b2395aa
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/.gitignore
@@ -0,0 +1,3 @@
+composer.lock
+composer.phar
+/vendor/
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/LICENSE b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/LICENSE
new file mode 100644
index 0000000..2877a48
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2016 container-interop
+Copyright (c) 2016 PHP Framework Interoperability Group
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/README.md b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/README.md
new file mode 100644
index 0000000..1b9d9e5
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/README.md
@@ -0,0 +1,13 @@
+Container interface
+==============
+
+This repository holds all interfaces related to [PSR-11 (Container Interface)][psr-url].
+
+Note that this is not a Container implementation of its own. It is merely abstractions that describe the components of a Dependency Injection Container.
+
+The installable [package][package-url] and [implementations][implementation-url] are listed on Packagist.
+
+[psr-url]: https://www.php-fig.org/psr/psr-11/
+[package-url]: https://packagist.org/packages/psr/container
+[implementation-url]: https://packagist.org/providers/psr/container-implementation
+
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/composer.json b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/composer.json
new file mode 100644
index 0000000..3797a25
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/composer.json
@@ -0,0 +1,22 @@
+{
+    "name": "psr/container",
+    "type": "library",
+    "description": "Common Container Interface (PHP FIG PSR-11)",
+    "keywords": ["psr", "psr-11", "container", "container-interop", "container-interface"],
+    "homepage": "https://github.com/php-fig/container",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "PHP-FIG",
+            "homepage": "https://www.php-fig.org/"
+        }
+    ],
+    "require": {
+        "php": ">=7.2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Psr\\Container\\": "src/"
+        }
+    }
+}
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerExceptionInterface.php b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerExceptionInterface.php
new file mode 100644
index 0000000..cf10b8b
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerExceptionInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Psr\Container;
+
+/**
+ * Base interface representing a generic exception in a container.
+ */
+interface ContainerExceptionInterface
+{
+}
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerInterface.php b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerInterface.php
new file mode 100644
index 0000000..cf8e7fd
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/ContainerInterface.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psr\Container;
+
+/**
+ * Describes the interface of a container that exposes methods to read its entries.
+ */
+interface ContainerInterface
+{
+    /**
+     * Finds an entry of the container by its identifier and returns it.
+     *
+     * @param string $id Identifier of the entry to look for.
+     *
+     * @throws NotFoundExceptionInterface  No entry was found for **this** identifier.
+     * @throws ContainerExceptionInterface Error while retrieving the entry.
+     *
+     * @return mixed Entry.
+     */
+    public function get(string $id);
+
+    /**
+     * Returns true if the container can return an entry for the given identifier.
+     * Returns false otherwise.
+     *
+     * `has($id)` returning true does not mean that `get($id)` will not throw an exception.
+     * It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.
+     *
+     * @param string $id Identifier of the entry to look for.
+     *
+     * @return bool
+     */
+    public function has(string $id);
+}
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/NotFoundExceptionInterface.php b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/NotFoundExceptionInterface.php
new file mode 100644
index 0000000..650bf46
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/psr/container/src/NotFoundExceptionInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Psr\Container;
+
+/**
+ * No entry was found in the container.
+ */
+interface NotFoundExceptionInterface extends ContainerExceptionInterface
+{
+}