diff --git a/composer.json b/composer.json
index 4aae211..1f291aa 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
     "homepage": "https://www.dokobit.com",
 
     "require": {
-        "php"                       : "^7.2.5",
+        "php"                       : "^7.2.5|^8.0",
         "guzzlehttp/guzzle"         : "^7.0",
         "symfony/validator"         : "~3.4|~4.4|~5.2"
     },
diff --git a/src/Query/Signing/AddSigner.php b/src/Query/Signing/AddSigner.php
index 83a8cea..8674ebb 100644
--- a/src/Query/Signing/AddSigner.php
+++ b/src/Query/Signing/AddSigner.php
@@ -91,7 +91,6 @@ public function getValidationConstraints(): Assert\Collection
                         ]),
                         'country_code' => new Assert\Optional([
                             new Assert\NotBlank(),
-                            new Assert\Country(),
                         ]),
                         'city' => new Assert\Optional([
                             new Assert\NotBlank(),
diff --git a/src/Query/Signing/Create.php b/src/Query/Signing/Create.php
index 3898aa7..1075050 100644
--- a/src/Query/Signing/Create.php
+++ b/src/Query/Signing/Create.php
@@ -180,7 +180,6 @@ public function getValidationConstraints(): Assert\Collection
                         ]),
                         'country_code' => new Assert\Optional([
                             new Assert\NotBlank(),
-                            new Assert\Country(),
                         ]),
                         'city' => new Assert\Optional([
                             new Assert\NotBlank(),