diff --git a/composer.json b/composer.json
index 05b05c75..6af16647 100644
--- a/composer.json
+++ b/composer.json
@@ -42,8 +42,8 @@
         "doctrine/annotations": "^1.2.6 || ^1.13.3",
         "php-parallel-lint/php-console-highlighter": "^1.0.0",
         "php-parallel-lint/php-parallel-lint": "^1.3.2",
-        "phpcompatibility/php-compatibility": "^9.3.5",
-        "squizlabs/php_codesniffer": "^3.7.2",
+        "phpcompatibility/php-compatibility": "^10.0.0@dev",
+        "squizlabs/php_codesniffer": "^3.13.5",
         "yoast/phpunit-polyfills": "^1.0.4"
     },
     "suggest": {
@@ -58,6 +58,8 @@
         "symfony/polyfill-mbstring": "To support UTF-8 if the Mbstring PHP extension is not enabled (^1.2)",
         "thenetworg/oauth2-azure": "Needed for Microsoft XOAUTH2 authentication"
     },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "autoload": {
         "psr-4": {
             "PHPMailer\\PHPMailer\\": "src/"
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index e2d1e5c6..5642fd91 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -30,9 +30,9 @@
     <rule ref="PHPCompatibility">
         <exclude name="PHPCompatibility.Constants.NewConstants.stream_crypto_method_tlsv1_1_clientFound"/>
         <exclude name="PHPCompatibility.Constants.NewConstants.stream_crypto_method_tlsv1_2_clientFound"/>
-        <exclude name="PHPCompatibility.Constants.RemovedConstants.intl_idna_variant_2003Deprecated"/>
+        <exclude name="PHPCompatibility.Constants.RemovedConstants.intl_idna_variant_2003DeprecatedRemoved"/>
         <exclude name="PHPCompatibility.FunctionUse.NewFunctions.random_bytesFound"/>
-        <exclude name="PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecated"/>
+        <exclude name="PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecatedRemoved"/>
         <exclude name="PHPCompatibility.ParameterValues.NewIDNVariantDefault.NotSet"/>
     </rule>