diff --git a/src/JpnForPhp/Transliterator/Kana.php b/src/JpnForPhp/Transliterator/Kana.php
index <HASH>..<HASH> 100644
--- a/src/JpnForPhp/Transliterator/Kana.php
+++ b/src/JpnForPhp/Transliterator/Kana.php
@@ -139,7 +139,7 @@ class Kana
     protected $mapPunctuationMarks = array(
         ' ' => '　', ',' => '、', ', ' => '、', '-' => '・', '.' => '。', ':' => '：', '!' => '！', '?' => '？',
         '(' => '（', ')' => '）', '{' => '｛', '}' => '｝',
-        '[' => '［', ']' => '］', '[' => '【', ']' => '】',
+        '[' => '［', ']' => '］',
         '~' => '〜',
     );
Remove duplicated opening/closing brackets (Fixes #<I>)