diff --git a/LICENSE.txt b/LICENSE.txt
index d2f70d2..71f32b7 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 - 2020 Ivan Tcholakov <ivantcholakov@gmail.com>
+Copyright (c) 2015 - 2022 Ivan Tcholakov <ivantcholakov@gmail.com>
 Copyright (c) 2011 - 2015 Ryan Marshall <ryan@irealms.co.uk>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/README.md b/README.md
index e294129..af0bb81 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,6 @@ http://iridadesign.com/starter-public-edition-4/www/playground/gravatar-test
 License Information
 -------------------
 
-Copyright (c) 2015 - 2020 Ivan Tcholakov, ivantcholakov@gmail.com  
+Copyright (c) 2015 - 2022 Ivan Tcholakov, ivantcholakov@gmail.com  
 Copyright (c) 2011 - 2015 Ryan Marshall, http://irealms.co.uk  
 License: The MIT License (MIT), http://opensource.org/licenses/MIT
diff --git a/libraries/Gravatar.php b/libraries/Gravatar.php
index 28adc92..8d55e19 100644
--- a/libraries/Gravatar.php
+++ b/libraries/Gravatar.php
@@ -3,12 +3,12 @@
 /**
  * Gravatar Library for CodeIgniter
  *
- * @author Ivan Tcholakov <ivantcholakov@gmail.com>, 2015 - 2020
+ * @author Ivan Tcholakov <ivantcholakov@gmail.com>, 2015 - 2022
  * @author Ryan Marshall <ryan@irealms.co.uk>, 2011 - 2015, @link http://irealms.co.uk
  *
  * Code repository: @link https://github.com/ivantcholakov/Codeigniter-Gravatar
  *
- * @version 1.1.2
+ * @version 1.1.3
  *
  * @license The MIT License (MIT)
  * @link http://opensource.org/licenses/MIT
@@ -241,7 +241,7 @@ public function execute_profile_request($email, $format = null) {
             }
         }
 
-        $format = trim($format);
+        $format = trim((string) $format);
 
         if ($format != '') {
             $format = '.'.ltrim($format, '.');
@@ -332,7 +332,7 @@ public function last_error() {
      */
     public function create_hash($email) {
 
-        return md5(strtolower(trim($email)));
+        return md5(strtolower(trim((string) $email)));
     }
 
     protected function is_https() {
@@ -369,7 +369,7 @@ protected function is_https() {
      */
     public function set_email($email)
     {
-        $email = trim(strtolower($email));
+        $email = trim(strtolower((string) $email));
 
         if ( ! filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE)
         {