diff --git a/src/Stringy.php b/src/Stringy.php
index 125191b..3398b09 100644
--- a/src/Stringy.php
+++ b/src/Stringy.php
@@ -1745,7 +1745,7 @@ class Stringy implements Countable, IteratorAggregate, ArrayAccess
             'w'     => ['ŵ', 'ω', 'ώ', 'ဝ', 'ွ', 'ｗ'],
             'x'     => ['χ', 'ξ', 'ｘ'],
             'y'     => ['ý', 'ỳ', 'ỷ', 'ỹ', 'ỵ', 'ÿ', 'ŷ', 'й', 'ы', 'υ',
-                        'ϋ', 'ύ', 'ΰ', 'ي', 'ယ', 'ｙ'],
+                        'ϋ', 'ύ', 'ΰ', 'ي', 'ယ', 'ｙ', 'ь', 'ъ'],
             'z'     => ['ź', 'ž', 'ż', 'з', 'ζ', 'ز', 'ဇ', 'ზ', 'ｚ'],
             'aa'    => ['ع', 'आ', 'آ'],
             'ae'    => ['æ', 'ǽ'],
@@ -1816,7 +1816,7 @@ class Stringy implements Countable, IteratorAggregate, ArrayAccess
             'W'     => ['Ω', 'Ώ', 'Ŵ', 'Ｗ'],
             'X'     => ['Χ', 'Ξ', 'Ｘ'],
             'Y'     => ['Ý', 'Ỳ', 'Ỷ', 'Ỹ', 'Ỵ', 'Ÿ', 'Ῠ', 'Ῡ', 'Ὺ', 'Ύ',
-                        'Ы', 'Й', 'Υ', 'Ϋ', 'Ŷ', 'Ｙ', 'Ъ', 'Ь'],
+                        'Ы', 'Й', 'Υ', 'Ϋ', 'Ŷ', 'Ｙ', 'Ь', 'Ъ'],
             'Z'     => ['Ź', 'Ž', 'Ż', 'З', 'Ζ', 'Ｚ'],
             'AE'    => ['Æ', 'Ǽ'],
             'Ch'    => ['Ч'],