diff --git a/src/LoggerHandler.php b/src/LoggerHandler.php
index 74c00f7..37a38ad 100644
--- a/src/LoggerHandler.php
+++ b/src/LoggerHandler.php
@@ -20,10 +20,14 @@ use Psr\Log\NullLogger;
 
 class LoggerHandler
 {
+    /** @var LoggerHandler */
     private static $instance = null;
     private $logger;
 
-    public static function getInstance(): ?LoggerHandler
+    /**
+     * @return LoggerHandler
+     */
+    public static function getInstance(): LoggerHandler
     {
         if (self::$instance === null) {
             self::$instance = new self();