diff --git a/src/Jms/YamlValidatorConverter.php b/src/Jms/YamlValidatorConverter.php
index ba0c764..0847a78 100644
--- a/src/Jms/YamlValidatorConverter.php
+++ b/src/Jms/YamlValidatorConverter.php
@@ -145,10 +145,20 @@ private function loadValidatorType(array &$property, Type $type, $arrayized = fa
                         foreach ($check as $item) {
                             // initial support for https://www.w3.org/TR/xsd-unicode-blocknames/
                             // not supported by standard php regex implementation
-                            $regexPattern = strtr($item['value'], [
-                                '\p{IsBasicLatin}' => '\p{Latin}',
-                                '\p{IsLatin-1Supplement}' => '\p{S}',
-                            ]);
+                            // \p{IsBasicLatin} represents a range, but the expression might be alraedy in a range,
+                            // so we try our best and detect it if is in a range or not
+                            $regexPattern =  $item['value'];
+                            $unicodeClasses = [
+                                '\p{IsBasicLatin}' => '\x{0000}-\x{007F}',
+                                '\p{IsLatin-1Supplement}' => '\x{0080}-\x{00FF}',
+                            ];
+                            foreach ($unicodeClasses as $from => $to) {
+                                if (preg_match('~\[.*'.preg_quote($from, '~').'.*\]~', $regexPattern)) {
+                                    $regexPattern = str_replace($from, $to, $regexPattern);
+                                } else {
+                                    $regexPattern = str_replace($from, "[$to]", $regexPattern);
+                                }
+                            }
                             $rules[] = [
                                 'Regex' => ['pattern' => "~{$regexPattern}~u"],
                             ];
diff --git a/tests/Converter/Validator/Xsd2ValidatorTest.php b/tests/Converter/Validator/Xsd2ValidatorTest.php
index 985c7e0..bdf5e04 100644
--- a/tests/Converter/Validator/Xsd2ValidatorTest.php
+++ b/tests/Converter/Validator/Xsd2ValidatorTest.php
@@ -126,11 +126,22 @@ public function getRestrictionsValidations()
             ],
             // pattern / Regex
             [
-                '<xs:pattern value="\\p{IsBasicLatin}\\p{IsLatin-1Supplement}"/>',
+                '<xs:pattern value="\\p{IsBasicLatin}+\\p{IsLatin-1Supplement}"/>',
+                [
+                    [
+                        'Regex' => [ // adds [] parenthesis
+                            'pattern' => '~[\x{0000}-\x{007F}]+[\x{0080}-\x{00FF}]~u',
+                            'groups' => ['xsd_rules'],
+                        ],
+                    ],
+                ],
+            ],
+            [
+                '<xs:pattern value="[A-Z\\p{IsBasicLatin}\\p{IsLatin-1Supplement}]"/>',
                 [
                     [
                         'Regex' => [
-                            'pattern' => '~\p{Latin}\p{S}~u',
+                            'pattern' => '~[\x{0000}-\x{007F}\x{0080}-\x{00FF}]~u',
                             'groups' => ['xsd_rules'],
                         ],
                     ],