diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ec66e0..9e0f721 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,7 @@ jobs:
     strategy:
       matrix:
         php:
+          - 8.1
           - 8.0
           - 7.4
           - 7.3
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 70474c1..5d73783 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -4,8 +4,9 @@
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          bootstrap="vendor/autoload.php"
+         cacheResult="false"
          colors="true"
-         cacheResult="false">
+         convertDeprecationsToExceptions="true">
     <testsuites>
         <testsuite name="Ssh Proxy Test Suite">
             <directory>./tests/</directory>
diff --git a/src/SshSocksConnector.php b/src/SshSocksConnector.php
index 6f98436..47e6c7c 100644
--- a/src/SshSocksConnector.php
+++ b/src/SshSocksConnector.php
@@ -75,7 +75,7 @@ public function __construct($uri, LoopInterface $loop = null)
         }
 
         $args = array();
-        \parse_str(parse_url($uri, \PHP_URL_QUERY), $args);
+        \parse_str((string) parse_url($uri, \PHP_URL_QUERY), $args);
         if (isset($args['bind'])) {
             $parts = parse_url('tcp://' . $args['bind']);
             if (!isset($parts['scheme'], $parts['host'], $parts['port']) || @\inet_pton(\trim($parts['host'], '[]')) === false) {