diff --git a/composer.json b/composer.json
index 1a4dda8..4503c55 100755
--- a/composer.json
+++ b/composer.json
@@ -15,12 +15,12 @@
         "email": "dt_hoteles@atrapalo.com"
     },
     "require": {
-        "php": "^7.0",
+        "php": "^7.0 | ^8.0",
         "ext-openssl": "*",
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5"
+        "phpunit/phpunit": "^6.5 | ^9.5"
     },
     "autoload": {
         "psr-4": {"Atrapalo\\": "src/"}
diff --git a/tests/UrlCrypt/UrlCryptTest.php b/tests/UrlCrypt/UrlCryptTest.php
index 5fcdc51..c4eba58 100755
--- a/tests/UrlCrypt/UrlCryptTest.php
+++ b/tests/UrlCrypt/UrlCryptTest.php
@@ -10,7 +10,7 @@ class UrlCryptTest extends TestCase
     /** @var UrlCrypt */
     private $urlCrypt;
     
-    protected function setUp()
+    protected function setUp() : void
     {
         $this->urlCrypt = new UrlCrypt();
     }