diff --git a/src/DI/Config/DefinitionSchema.php b/src/DI/Config/DefinitionSchema.php
index 0e47134f3..e1a394cbf 100644
--- a/src/DI/Config/DefinitionSchema.php
+++ b/src/DI/Config/DefinitionSchema.php
@@ -130,7 +130,7 @@ public function completeDefault(Context $context)
 	private function sniffType($key, array $def): string
 	{
 		if (is_string($key)) {
-			$name = preg_match('#^@[\w\\\\]+\z#', $key)
+			$name = preg_match('#^@[\w\\\\]+$#D', $key)
 				? $this->builder->getByType(substr($key, 1), false)
 				: $key;
 
diff --git a/src/DI/ContainerBuilder.php b/src/DI/ContainerBuilder.php
index e1912b232..71942050e 100644
--- a/src/DI/ContainerBuilder.php
+++ b/src/DI/ContainerBuilder.php
@@ -64,7 +64,7 @@ public function addDefinition(?string $name, Definition $definition = null): Def
 			for ($i = 1; isset($this->definitions['0' . $i]) || isset($this->aliases['0' . $i]); $i++);
 			$name = '0' . $i; // prevents converting to integer in array key
 
-		} elseif (is_int(key([$name => 1])) || !preg_match('#^\w+(\.\w+)*\z#', $name)) {
+		} elseif (is_int(key([$name => 1])) || !preg_match('#^\w+(\.\w+)*$#D', $name)) {
 			throw new Nette\InvalidArgumentException(sprintf('Service name must be a alpha-numeric string and not a number, %s given.', gettype($name)));
 
 		} else {
diff --git a/src/DI/Definitions/ServiceDefinition.php b/src/DI/Definitions/ServiceDefinition.php
index 515409c59..231e35d1a 100644
--- a/src/DI/Definitions/ServiceDefinition.php
+++ b/src/DI/Definitions/ServiceDefinition.php
@@ -244,7 +244,7 @@ public function generateMethod(Nette\PhpGenerator\Method $method, Nette\DI\PhpGe
 			$this->setup
 			&& $type !== $entity
 			&& !(is_array($entity) && $entity[0] instanceof Reference && $entity[0]->getValue() === Nette\DI\ContainerBuilder::THIS_CONTAINER)
-			&& !(is_string($entity) && preg_match('#^[\w\\\\]+\z#', $entity) && is_subclass_of($entity, $type))
+			&& !(is_string($entity) && preg_match('#^[\w\\\\]+$#D', $entity) && is_subclass_of($entity, $type))
 		) {
 			$code .= PhpHelpers::formatArgs("if (!\$service instanceof $type) {\n"
 				. "\tthrow new Nette\\UnexpectedValueException(?);\n}\n",
diff --git a/src/DI/Extensions/ServicesExtension.php b/src/DI/Extensions/ServicesExtension.php
index f2024668c..2bb84904a 100644
--- a/src/DI/Extensions/ServicesExtension.php
+++ b/src/DI/Extensions/ServicesExtension.php
@@ -223,7 +223,7 @@ private function convertKeyToName($key): ?string
 	{
 		if (is_int($key)) {
 			return null;
-		} elseif (preg_match('#^@[\w\\\\]+\z#', $key)) {
+		} elseif (preg_match('#^@[\w\\\\]+$#D', $key)) {
 			return $this->getContainerBuilder()->getByType(substr($key, 1), true);
 		}
 		return $key;
diff --git a/src/DI/Helpers.php b/src/DI/Helpers.php
index c98c23676..bc525e8eb 100644
--- a/src/DI/Helpers.php
+++ b/src/DI/Helpers.php
@@ -101,9 +101,9 @@ public static function filterArguments(array $args): array
 		foreach ($args as $k => $v) {
 			if ($v === '...') {
 				unset($args[$k]);
-			} elseif (is_string($v) && preg_match('#^[\w\\\\]*::[A-Z][A-Z0-9_]*\z#', $v, $m)) {
+			} elseif (is_string($v) && preg_match('#^[\w\\\\]*::[A-Z][A-Z0-9_]*$#D', $v, $m)) {
 				$args[$k] = constant(ltrim($v, ':'));
-			} elseif (is_string($v) && preg_match('#^@[\w\\\\]+\z#', $v)) {
+			} elseif (is_string($v) && preg_match('#^@[\w\\\\]+$#D', $v)) {
 				$args[$k] = new Reference(substr($v, 1));
 			} elseif (is_array($v)) {
 				$args[$k] = self::filterArguments($v);
diff --git a/src/DI/Resolver.php b/src/DI/Resolver.php
index e738f4d54..3438f807c 100644
--- a/src/DI/Resolver.php
+++ b/src/DI/Resolver.php
@@ -195,7 +195,7 @@ public function completeStatement(Statement $statement, bool $currentServiceAllo
 				break;
 
 			case is_array($entity):
-				if (!preg_match('#^\$?(\\\\?' . PhpHelpers::PHP_IDENT . ')+(\[\])?\z#', $entity[1])) {
+				if (!preg_match('#^\$?(\\\\?' . PhpHelpers::PHP_IDENT . ')+(\[\])?$#D', $entity[1])) {
 					throw new ServiceCreationException("Expected function, method or property name, '$entity[1]' given.");
 				}
 
@@ -432,7 +432,7 @@ private function convertReferences(array $arguments): array
 				$pair = explode('::', substr($val, 1), 2);
 				if (!isset($pair[1])) { // @service
 					$val = new Reference($pair[0]);
-				} elseif (preg_match('#^[A-Z][A-Z0-9_]*\z#', $pair[1], $m)) { // @service::CONSTANT
+				} elseif (preg_match('#^[A-Z][A-Z0-9_]*$#D', $pair[1], $m)) { // @service::CONSTANT
 					$val = ContainerBuilder::literal($this->resolveReferenceType(new Reference($pair[0])) . '::' . $pair[1]);
 				} else { // @service::property
 					$val = new Statement([new Reference($pair[0]), '$' . $pair[1]]);