diff --git a/CHANGELOG.md b/CHANGELOG.md
index aeadca1..be01069 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.1.1 #
+
+Fixed a bug with isAjaxRequest()
+
 # 1.1 #
 
 `Alo::ifundefined()` added
diff --git a/README.md b/README.md
index cc48482..9e2eb46 100644
--- a/README.md
+++ b/README.md
@@ -10,5 +10,5 @@ Latest release API documentation: [https://aloframework.github.io/common/](https
 
 |                                                                                          dev-develop                                                                                         |                                                             Latest release                                                            |
 |:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------------------------:|
-| [![Dev Build Status](https://travis-ci.org/aloframework/common.svg?branch=develop)](https://travis-ci.org/aloframework/common)                                                              | [![Release Build Status](https://travis-ci.org/aloframework/common.svg?branch=1.1)](https://travis-ci.org/aloframework/common)            |
+| [![Dev Build Status](https://travis-ci.org/aloframework/common.svg?branch=develop)](https://travis-ci.org/aloframework/common)                                                              | [![Release Build Status](https://travis-ci.org/aloframework/common.svg?branch=1.1.1)](https://travis-ci.org/aloframework/common)            |
 | [![SensioLabsInsight](https://insight.sensiolabs.com/projects/2f980e0c-215e-4d11-8313-4d071b32b4fd/mini.png)](https://insight.sensiolabs.com/projects/2f980e0c-215e-4d11-8313-4d071b32b4fd) | [![SensioLabsInsight](https://i.imgur.com/KygqLtf.png)](https://insight.sensiolabs.com/projects/2f980e0c-215e-4d11-8313-4d071b32b4fd) |
diff --git a/src/Alo.php b/src/Alo.php
index d982ea5..e297268 100644
--- a/src/Alo.php
+++ b/src/Alo.php
@@ -126,6 +126,6 @@ static function ifundefined($const, $planB) {
          * @return bool
          */
         static function isAjaxRequest() {
-            return strtolower(self::get($_SERVER['HTTP_X_REQUESTED_WITH'])) == 'xmlhttprequest';
+            return self::get($_SERVER['HTTP_X_REQUESTED_WITH']) == 'XMLHttpRequest';
         }
     }