diff --git a/src/League/OAuth2/Server/Grant/Password.php b/src/League/OAuth2/Server/Grant/Password.php
index 9cbb90e9..316f22c5 100644
--- a/src/League/OAuth2/Server/Grant/Password.php
+++ b/src/League/OAuth2/Server/Grant/Password.php
@@ -206,7 +206,7 @@ class Password implements GrantTypeInterface {
 
         $response = array(
             'access_token'  =>  $accessToken,
-            'token_type'    =>  'bearer',
+            'token_type'    =>  'Bearer',
             'expires'       =>  $accessTokenExpires,
             'expires_in'    =>  $accessTokenExpiresIn
         );
@@ -222,4 +222,4 @@ class Password implements GrantTypeInterface {
         return $response;
     }
 
-}
\ No newline at end of file
+}