diff --git a/lib/Push.php b/lib/Push.php
index 85de6a0ad..acae9d998 100644
--- a/lib/Push.php
+++ b/lib/Push.php
@@ -319,7 +319,7 @@ protected function encryptAndSign(Key $userKey, array $device, int $id, INotific
 
 		// Max length of encryption is 255, so we need to make sure the subject is shorter.
 		// We also substract a buffer of 10 bytes.
-		$maxDataLength = 255 - strlen(json_encode($data)) - 10;
+		$maxDataLength = 200 - strlen(json_encode($data));
 		$data['subject'] = $this->shortenJsonEncodedMultibyte($notification->getParsedSubject(), $maxDataLength);
 		if ($notification->getParsedSubject() !== $data['subject']) {
 			$data['subject'] .= '…';