diff --git a/composer.json b/composer.json
index 83981f1..ac25eb6 100644
--- a/composer.json
+++ b/composer.json
@@ -19,8 +19,8 @@
       "bin/baikalstorage"
     ],
     "require": {
-        "php": ">=5.5",
-        "sabre/dav"     : "~4.1.4",
+        "php"           : "^7.2 || ^8.0",
+        "sabre/dav"     : "~4.3.0",
         "sabre/vobject": "^4.2.1",
         "nesbot/carbon": "^2.0.0",
         "laminas/laminas-validator": "^2.13",