diff --git a/doc/deprecated.rst b/doc/deprecated.rst
index 0b69f9139..6e8212fb0 100644
--- a/doc/deprecated.rst
+++ b/doc/deprecated.rst
@@ -218,9 +218,9 @@ Parser
   3.12.
 
 * The ``Twig\Parser::getExpressionParser()`` method is deprecated as of Twig
-  3.20, use ``Twig\Parser::parseExpression()`` instead.
+  3.21, use ``Twig\Parser::parseExpression()`` instead.
 
-* The ``Twig\ExpressionParser`` class is deprecated as of Twig 3.20:
+* The ``Twig\ExpressionParser`` class is deprecated as of Twig 3.21:
 
   * ``parseExpression()``, use ``Parser::parseExpression()``
   * ``parsePrimaryExpression()``, use ``Parser::parseExpression()``
@@ -247,7 +247,7 @@ Token
 * The ``Token::getType()`` method is deprecated as of Twig 3.19, use
   ``Token::test()`` instead.
 
-* The ``Token::ARROW_TYPE`` constant is deprecated as of Twig 3.20, the arrow
+* The ``Token::ARROW_TYPE`` constant is deprecated as of Twig 3.21, the arrow
   ``=>`` is now an operator (``Token::OPERATOR_TYPE``).
 
 * The ``Token::PUNCTUATION_TYPE`` with values ``(``, ``[``, ``|``, ``.``,
@@ -378,7 +378,7 @@ Node
 Operators
 ---------
 
-* An operator precedence must be part of the [0, 512] range as of Twig 3.20.
+* An operator precedence must be part of the [0, 512] range as of Twig 3.21.
 
 * The ``.`` operator allows accessing class constants as of Twig 3.15.
   This can be a BC break if you don't use UPPERCASE constant names.
@@ -436,10 +436,10 @@ Operators
     {{ (not 1) * 2 }} {# this is equivalent to what Twig 4.x will do without the parentheses #}
 
 * Using the ``|`` operator in an expression with ``+`` or ``-`` without explicit
-  parentheses to clarify precedence triggers a deprecation as of Twig 3.20 (in
+  parentheses to clarify precedence triggers a deprecation as of Twig 3.21 (in
   Twig 4.0, ``|`` will have a higher precedence than ``+`` and ``-``).
 
-  For example, the following expression will trigger a deprecation in Twig 3.20::
+  For example, the following expression will trigger a deprecation in Twig 3.21::
 
     {{ -1|abs }}
 
@@ -452,7 +452,7 @@ Operators
     {{ (-1)|abs }} {# this is equivalent to what Twig 4.x will do without the parentheses #}
 
 * The ``Twig\Extension\ExtensionInterface::getOperators()`` method is deprecated
-  as of Twig 3.20, use ``Twig\Extension\ExtensionInterface::getExpressionParsers()``
+  as of Twig 3.21, use ``Twig\Extension\ExtensionInterface::getExpressionParsers()``
   instead:
 
     Before:
@@ -474,5 +474,5 @@ Operators
           ];
       }
 
-* The ``Twig\OperatorPrecedenceChange`` class is deprecated as of Twig 3.20,
+* The ``Twig\OperatorPrecedenceChange`` class is deprecated as of Twig 3.21,
   use ``Twig\ExpressionParser\PrecedenceChange`` instead.
diff --git a/doc/filters/number_format.rst b/doc/filters/number_format.rst
index f9e9d718b..4f68596fb 100644
--- a/doc/filters/number_format.rst
+++ b/doc/filters/number_format.rst
@@ -16,7 +16,7 @@ separator using the additional arguments:
     {{ 9800.333|number_format(2, '.', ',') }}
 
 To format negative numbers, wrap the previous statement with parentheses (note
-that as of Twig 3.20, not using parentheses is deprecated as the filter
+that as of Twig 3.21, not using parentheses is deprecated as the filter
 operator will change precedence in Twig 4.0):
 
 .. code-block:: twig
diff --git a/src/ExpressionParser.php b/src/ExpressionParser.php
index d90d5f90b..60ebcb667 100644
--- a/src/ExpressionParser.php
+++ b/src/ExpressionParser.php
@@ -36,16 +36,16 @@ use Twig\Node\Nodes;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  *
- * @deprecated since Twig 3.20
+ * @deprecated since Twig 3.21
  */
 class ExpressionParser
 {
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public const OPERATOR_LEFT = 1;
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public const OPERATOR_RIGHT = 2;
 
@@ -53,7 +53,7 @@ class ExpressionParser
         private Parser $parser,
         private Environment $env,
     ) {
-        trigger_deprecation('twig/twig', '3.20', 'Class "%s" is deprecated, use "Parser::parseExpression()" instead.', __CLASS__);
+        trigger_deprecation('twig/twig', '3.21', 'Class "%s" is deprecated, use "Parser::parseExpression()" instead.', __CLASS__);
     }
 
     public function parseExpression($precedence = 0)
@@ -62,27 +62,27 @@ class ExpressionParser
             trigger_deprecation('twig/twig', '3.15', 'Passing a second argument ($allowArrow) to "%s()" is deprecated.', __METHOD__);
         }
 
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated, use "Parser::parseExpression()" instead.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated, use "Parser::parseExpression()" instead.', __METHOD__);
 
         return $this->parser->parseExpression((int) $precedence);
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parsePrimaryExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         return $this->parseExpression();
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseStringExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         return $this->parseExpression();
     }
@@ -98,11 +98,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseSequenceExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         return $this->parseExpression();
     }
@@ -118,21 +118,21 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseMappingExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         return $this->parseExpression();
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parsePostfixExpression($node)
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         while (true) {
             $token = $this->parser->getCurrentToken();
@@ -153,11 +153,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseSubscriptExpression($node)
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         $parsers = new \ReflectionProperty($this->parser, 'parsers');
 
@@ -169,11 +169,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseFilterExpression($node)
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         $this->parser->getStream()->next();
 
@@ -181,11 +181,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseFilterExpressionRaw($node)
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         $parsers = new \ReflectionProperty($this->parser, 'parsers');
 
@@ -294,11 +294,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20, use "AbstractTokenParser::parseAssignmentExpression()" instead
+     * @deprecated since Twig 3.21, use "AbstractTokenParser::parseAssignmentExpression()" instead
      */
     public function parseAssignmentExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated, use "AbstractTokenParser::parseAssignmentExpression()" instead.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated, use "AbstractTokenParser::parseAssignmentExpression()" instead.', __METHOD__);
 
         $stream = $this->parser->getStream();
         $targets = [];
@@ -321,11 +321,11 @@ class ExpressionParser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function parseMultitargetExpression()
     {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s()" method is deprecated.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s()" method is deprecated.', __METHOD__);
 
         $targets = [];
         while (true) {
diff --git a/src/ExpressionParser/ExpressionParsers.php b/src/ExpressionParser/ExpressionParsers.php
index 7b8da2875..fb35a690e 100644
--- a/src/ExpressionParser/ExpressionParsers.php
+++ b/src/ExpressionParser/ExpressionParsers.php
@@ -50,7 +50,7 @@ final class ExpressionParsers implements \IteratorAggregate
     {
         foreach ($parsers as $parser) {
             if ($parser->getPrecedence() > 512 || $parser->getPrecedence() < 0) {
-                trigger_deprecation('twig/twig', '3.20', 'Precedence for "%s" must be between 0 and 512, got %d.', $parser->getName(), $parser->getPrecedence());
+                trigger_deprecation('twig/twig', '3.21', 'Precedence for "%s" must be between 0 and 512, got %d.', $parser->getName(), $parser->getPrecedence());
                 // throw new \InvalidArgumentException(\sprintf('Precedence for "%s" must be between 0 and 512, got %d.', $parser->getName(), $parser->getPrecedence()));
             }
             $interface = $parser instanceof PrefixExpressionParserInterface ? PrefixExpressionParserInterface::class : InfixExpressionParserInterface::class;
diff --git a/src/ExpressionParser/Infix/FilterExpressionParser.php b/src/ExpressionParser/Infix/FilterExpressionParser.php
index e47d3fe67..0bbe6b409 100644
--- a/src/ExpressionParser/Infix/FilterExpressionParser.php
+++ b/src/ExpressionParser/Infix/FilterExpressionParser.php
@@ -75,7 +75,7 @@ final class FilterExpressionParser extends AbstractExpressionParser implements I
 
     public function getPrecedenceChange(): ?PrecedenceChange
     {
-        return new PrecedenceChange('twig/twig', '3.20', 300);
+        return new PrecedenceChange('twig/twig', '3.21', 300);
     }
 
     public function getAssociativity(): InfixAssociativity
diff --git a/src/ExtensionSet.php b/src/ExtensionSet.php
index b1f4fc82c..5afa729f9 100644
--- a/src/ExtensionSet.php
+++ b/src/ExtensionSet.php
@@ -510,7 +510,7 @@ final class ExtensionSet
         }
 
         if (\count($expressionParsers)) {
-            trigger_deprecation('twig/twig', '3.20', \sprintf('Extension "%s" uses the old signature for "getOperators()", please implement "getExpressionParsers()" instead.', $extension::class));
+            trigger_deprecation('twig/twig', '3.21', \sprintf('Extension "%s" uses the old signature for "getOperators()", please implement "getExpressionParsers()" instead.', $extension::class));
 
             $this->expressionParsers->add($expressionParsers);
         }
@@ -518,7 +518,7 @@ final class ExtensionSet
 
     private function convertInfixExpressionParser(string $nodeClass, string $operator, int $precedence, InfixAssociativity $associativity, ?PrecedenceChange $precedenceChange, array $aliases, callable $callable): InfixExpressionParserInterface
     {
-        trigger_deprecation('twig/twig', '3.20', \sprintf('Using a non-ExpressionParserInterface object to define the "%s" binary operator is deprecated.', $operator));
+        trigger_deprecation('twig/twig', '3.21', \sprintf('Using a non-ExpressionParserInterface object to define the "%s" binary operator is deprecated.', $operator));
 
         return new class($nodeClass, $operator, $precedence, $associativity, $precedenceChange, $aliases, $callable) extends BinaryOperatorExpressionParser {
             public function __construct(
diff --git a/src/OperatorPrecedenceChange.php b/src/OperatorPrecedenceChange.php
index e01530171..31ebaef48 100644
--- a/src/OperatorPrecedenceChange.php
+++ b/src/OperatorPrecedenceChange.php
@@ -27,7 +27,7 @@ class OperatorPrecedenceChange extends PrecedenceChange
         private string $version,
         private int $newPrecedence,
     ) {
-        trigger_deprecation('twig/twig', '3.20', 'The "%s" class is deprecated since Twig 3.20. Use "%s" instead.', self::class, PrecedenceChange::class);
+        trigger_deprecation('twig/twig', '3.21', 'The "%s" class is deprecated since Twig 3.21. Use "%s" instead.', self::class, PrecedenceChange::class);
 
         parent::__construct($package, $version, $newPrecedence);
     }
diff --git a/src/Parser.php b/src/Parser.php
index 01c49b8d8..5bbeadfd0 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -342,11 +342,11 @@ class Parser
     }
 
     /**
-     * @deprecated since Twig 3.20
+     * @deprecated since Twig 3.21
      */
     public function getExpressionParser(): ExpressionParser
     {
-        trigger_deprecation('twig/twig', '3.20', 'Method "%s()" is deprecated, use "parseExpression()" instead.', __METHOD__);
+        trigger_deprecation('twig/twig', '3.21', 'Method "%s()" is deprecated, use "parseExpression()" instead.', __METHOD__);
 
         if (null === $this->expressionParser) {
             $this->expressionParser = new ExpressionParser($this, $this->env);
diff --git a/src/Token.php b/src/Token.php
index 6390472e0..0d8b385eb 100644
--- a/src/Token.php
+++ b/src/Token.php
@@ -31,7 +31,7 @@ final class Token
     public const INTERPOLATION_START_TYPE = 10;
     public const INTERPOLATION_END_TYPE = 11;
     /**
-     * @deprecated since Twig 3.20, "arrow" is now an operator
+     * @deprecated since Twig 3.21, "arrow" is now an operator
      */
     public const ARROW_TYPE = 12;
     public const SPREAD_TYPE = 13;
@@ -42,7 +42,7 @@ final class Token
         private int $lineno,
     ) {
         if (self::ARROW_TYPE === $type) {
-            trigger_deprecation('twig/twig', '3.20', 'The "%s" token type is deprecated, "arrow" is now an operator.', self::ARROW_TYPE);
+            trigger_deprecation('twig/twig', '3.21', 'The "%s" token type is deprecated, "arrow" is now an operator.', self::ARROW_TYPE);
         }
     }
 
@@ -70,7 +70,7 @@ final class Token
         }
 
         if (self::ARROW_TYPE === $type) {
-            trigger_deprecation('twig/twig', '3.20', 'The "%s" token type is deprecated, "arrow" is now an operator.', self::typeToEnglish(self::ARROW_TYPE));
+            trigger_deprecation('twig/twig', '3.21', 'The "%s" token type is deprecated, "arrow" is now an operator.', self::typeToEnglish(self::ARROW_TYPE));
 
             return self::OPERATOR_TYPE === $this->type && '=>' === $this->value;
         }
@@ -79,7 +79,7 @@ final class Token
         if ($typeMatches && self::PUNCTUATION_TYPE === $type && \in_array($this->value, ['(', '[', '|', '.', '?', '?:']) && $values) {
             foreach ((array) $values as $value) {
                 if (\in_array($value, ['(', '[', '|', '.', '?', '?:'])) {
-                    trigger_deprecation('twig/twig', '3.20', 'The "%s" token is now an "%s" token instead of a "%s" one.', $this->value, self::typeToEnglish(self::OPERATOR_TYPE), $this->toEnglish());
+                    trigger_deprecation('twig/twig', '3.21', 'The "%s" token is now an "%s" token instead of a "%s" one.', $this->value, self::typeToEnglish(self::OPERATOR_TYPE), $this->toEnglish());
 
                     break;
                 }
diff --git a/tests/Fixtures/operators/minus_vs_pipe.legacy.test b/tests/Fixtures/operators/minus_vs_pipe.legacy.test
index 84eddeb21..ac6cd3278 100644
--- a/tests/Fixtures/operators/minus_vs_pipe.legacy.test
+++ b/tests/Fixtures/operators/minus_vs_pipe.legacy.test
@@ -1,7 +1,7 @@
 --TEST--
 | will have a higher precedence over + and - in Twig 4.0
 --DEPRECATION--
-Since twig/twig 3.20: As the "|" infix operator will change its precedence in the next major version, add explicit parentheses to avoid behavior change in "index.twig" at line 2.
+Since twig/twig 3.21: As the "|" infix operator will change its precedence in the next major version, add explicit parentheses to avoid behavior change in "index.twig" at line 2.
 --TEMPLATE--
 {{ -1|abs }}
 --DATA--