diff --git a/composer.json b/composer.json
index 930de69d15..6ae194dfb1 100644
--- a/composer.json
+++ b/composer.json
@@ -3,6 +3,11 @@
 	"type": "project",
 	"minimum-stability": "dev",
 	"prefer-stable" : true,
+	"config": {
+		"platform": {
+			"php": "7.3"
+		}
+	},
 	"require-dev": {
 		"roave/security-advisories": "dev-master",
 		"christophwurst/nextcloud": "dev-master",
diff --git a/composer.lock b/composer.lock
index 6ce34967ee..7c3defc6d4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "e2bb8c059ec5db70289266d1469aea82",
+    "content-hash": "ee36e4939f0d706a6cb294c3acb1b460",
     "packages": [],
     "packages-dev": [
         {
@@ -141,20 +141,20 @@
         },
         {
             "name": "psr/container",
-            "version": "1.1.2",
+            "version": "1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/container.git",
-                "reference": "513e0666f7216c7459170d56df27dfcefe1689ea"
+                "reference": "8622567409010282b7aeebe4bb841fe98b58dcaf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/container/zipball/513e0666f7216c7459170d56df27dfcefe1689ea",
-                "reference": "513e0666f7216c7459170d56df27dfcefe1689ea",
+                "url": "https://api.github.com/repos/php-fig/container/zipball/8622567409010282b7aeebe4bb841fe98b58dcaf",
+                "reference": "8622567409010282b7aeebe4bb841fe98b58dcaf",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.4.0"
+                "php": ">=7.2.0"
             },
             "type": "library",
             "autoload": {
@@ -183,9 +183,9 @@
             ],
             "support": {
                 "issues": "https://github.com/php-fig/container/issues",
-                "source": "https://github.com/php-fig/container/tree/1.1.2"
+                "source": "https://github.com/php-fig/container/tree/1.1.1"
             },
-            "time": "2021-11-05T16:50:12+00:00"
+            "time": "2021-03-05T17:36:06+00:00"
         },
         {
             "name": "psr/event-dispatcher",
@@ -730,5 +730,8 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
+    "platform-overrides": {
+        "php": "7.3"
+    },
     "plugin-api-version": "2.1.0"
 }