diff --git a/src/Builder.php b/src/Builder.php
index 12c150a..d4251e4 100644
--- a/src/Builder.php
+++ b/src/Builder.php
@@ -37,7 +37,6 @@
  */
 class Builder extends TestMethodProvider
 {
-    const NON_LITERAL_CHARACTERS = '[\\^$.|?*+()';
     const METHOD_TYPE_BEGIN = 0b00001;
     const METHOD_TYPE_CHARACTER = 0b00010;
     const METHOD_TYPE_GROUP = 0b00100;
@@ -170,7 +169,6 @@ public function oneOf(string $chars)
         $this->validateAndAddMethodType(self::METHOD_TYPE_CHARACTER, self::METHOD_TYPES_ALLOWED_FOR_CHARACTERS);
 
         $chars = $this->escape($chars);
-        $chars = $this->escapeRangeSpecificChars($chars);
 
         return $this->add('[' . $chars . ']');
     }
@@ -186,7 +184,6 @@ public function notOneOf(string $chars)
         $this->validateAndAddMethodType(self::METHOD_TYPE_CHARACTER, self::METHOD_TYPES_ALLOWED_FOR_CHARACTERS);
 
         $chars = $this->escape($chars);
-        $chars = $this->escapeRangeSpecificChars($chars);
 
         return $this->add('[^' . $chars . ']');
     }
@@ -576,28 +573,7 @@ public function until($toCondition) : self
      */
     protected function escape(string $chars)
     {
-        return implode('', array_map([$this, 'escapeChar'], str_split($chars)));
-    }
-
-    /**
-     * Escape specific character.
-     *
-     * @param string $char
-     * @return string
-     */
-    protected function escapeChar(string $char)
-    {
-        return (strpos(static::NON_LITERAL_CHARACTERS, $char) !== false ? '\\' : '') . $char;
-    }
-
-    /**
-     * Escape '-' and ']' in string to be used in range.
-     *
-     * @return string
-     */
-    protected function escapeRangeSpecificChars(string $chars)
-    {
-        return str_replace(['-', ']'], ['\\-', '\\]'], $chars);
+        return preg_quote($chars);
     }
 
     /**
diff --git a/tests/LanguageInterpreterTest.php b/tests/LanguageInterpreterTest.php
index 1079403..6be8a06 100644
--- a/tests/LanguageInterpreterTest.php
+++ b/tests/LanguageInterpreterTest.php
@@ -13,7 +13,7 @@ public function testParser()
 
         $srl = new SRL('begin with literally "http", optional "s", literally "://", optional "www.",' .
             'anything once or more, literally ".com", must end');
-        $this->assertEquals('/^(?:http)(?:(?:s))?(?::\/\/)(?:(?:www\.))?.+(?:\.com)$/', $srl->get());
+        $this->assertEquals('/^(?:http)(?:(?:s))?(?:\:\/\/)(?:(?:www\.))?.+(?:\.com)$/', $srl->get());
         $this->assertTrue($srl->isMatching('http://www.ebay.com'));
         $this->assertTrue($srl->isMatching('https://google.com'));
         $this->assertFalse($srl->isMatching('htt://google.com'));
@@ -52,7 +52,7 @@ public function testParser()
         $this->assertEquals('/^[^a-z][^A-Z][^f-o][^O-z]/', $srl->get());
 
         $srl = new SRL('starts with not one of "!@#/"');
-        $this->assertEquals('/^[^!@#\/]/', $srl->get());
+        $this->assertEquals('/^[^\!@#\/]/', $srl->get());
 
         $srl = new SRL('backslash');
         $this->assertEquals('/\\\\/', $srl->get());