diff --git a/src/Guzzle.php b/src/Guzzle.php
index ada18ab..60ba4a1 100644
--- a/src/Guzzle.php
+++ b/src/Guzzle.php
@@ -5,11 +5,15 @@
 use GuzzleHttp\Exception\ConnectException;
 use GuzzleHttp\Exception\GuzzleException;
 use GuzzleHttp\Exception\RequestException;
-use GuzzleHttp\Psr7\Message;
+use Psr\Http\Message\MessageInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Throwable;
 
 class Guzzle
 {
+	private const MAX_BODY_LENGTH = 10000;
+
 	/**
 	 * @throws Throwable
 	 */
@@ -18,13 +22,75 @@ public static function handleException(Throwable $e): ?Exception
 		if ($e instanceof GuzzleException) {
 			$message = '';
 			if ($e instanceof ConnectException || $e instanceof RequestException) {
-				$message = "--- REQUEST ---\n" . Message::toString($e->getRequest()) . "\n --- RESPONSE ---\n";
+				$message = "--- REQUEST ---\n" . self::sanitizeMessage(self::messageToString($e->getRequest())) . "\n --- RESPONSE ---\n";
 			}
-			$message .= ($e instanceof RequestException && $e->getResponse() ? Message::toString($e->getResponse()) : $e->getMessage());
+			$message .= ($e instanceof RequestException && $e->getResponse() ? self::sanitizeMessage(self::messageToString($e->getResponse())) : $e->getMessage());
 
 			throw new Exception($message);
 		}
 
 		throw $e;
 	}
+
+	/**
+	 * Obdoba GuzzleHttp\Psr7\Message::toString(), ale tělo čte ze streamu jen do MAX_BODY_LENGTH.
+	 * Message::toString() načítá celé tělo do paměti, což u velkých těl (např. upload souboru
+	 * v multipart requestu) shodí proces na memory limitu ještě před ořezáním v sanitizeMessage().
+	 */
+	private static function messageToString(MessageInterface $message): string
+	{
+		if ($message instanceof RequestInterface) {
+			$msg = trim($message->getMethod() . ' ' . $message->getRequestTarget()) . ' HTTP/' . $message->getProtocolVersion();
+			if (!$message->hasHeader('host')) {
+				$msg .= "\r\nHost: " . $message->getUri()->getHost();
+			}
+		} elseif ($message instanceof ResponseInterface) {
+			$msg = 'HTTP/' . $message->getProtocolVersion() . ' ' . $message->getStatusCode() . ' ' . $message->getReasonPhrase();
+		} else {
+			$msg = '';
+		}
+
+		foreach ($message->getHeaders() as $name => $values) {
+			$msg .= "\r\n" . $name . ': ' . implode(', ', $values);
+		}
+
+		$body = '';
+		$stream = $message->getBody();
+		if ($stream->isSeekable() && $stream->isReadable()) {
+			$size = $stream->getSize();
+			$stream->seek(0);
+			$body = $stream->read(self::MAX_BODY_LENGTH);
+			if ($size === null || $size > self::MAX_BODY_LENGTH) {
+				$body .= "\n\n... [truncated" . ($size !== null ? ', total ' . $size . ' bytes' : '') . ']';
+			}
+		}
+
+		return $msg . "\r\n\r\n" . $body;
+	}
+
+	private static function sanitizeMessage(string $message): string
+	{
+		// Odstraneni binarnich dat (null byty apod.)
+		if (preg_match('/[^\x20-\x7E\x0A\x0D\t]/u', $message)) {
+			// Najdeme konec hlavicek (prazdny radek)
+			$headerEnd = strpos($message, "\r\n\r\n");
+			if ($headerEnd === false) {
+				$headerEnd = strpos($message, "\n\n");
+			}
+
+			if ($headerEnd !== false) {
+				$headers = substr($message, 0, $headerEnd);
+				return $headers . "\n\n[binary data removed]";
+			}
+
+			return '[binary data removed]';
+		}
+
+		// Oriznuti prilis dlouhych textovych odpovedi
+		if (strlen($message) > self::MAX_BODY_LENGTH) {
+			return substr($message, 0, self::MAX_BODY_LENGTH) . "\n\n... [truncated, total " . strlen($message) . " bytes]";
+		}
+
+		return $message;
+	}
 }
diff --git a/src/TErrorPresenter.php b/src/TErrorPresenter.php
index 42a921c..6f1dcff 100644
--- a/src/TErrorPresenter.php
+++ b/src/TErrorPresenter.php
@@ -2,6 +2,7 @@
 
 namespace ADT\Utils;
 
+use Nette\Application\Attributes\Persistent;
 use Nette\Application\BadRequestException;
 use Nette\Application\Helpers;
 use Nette\Routing\Router;
@@ -15,7 +16,7 @@ trait TErrorPresenter
 	protected bool $log404 = true;
 	protected bool $log500 = true;
 
-	/** @persistent */
+	#[Persistent]
 	public $url;
 
 	public function __construct(Router $router)