diff --git a/data/web/inc/ajax/qitem_details.php b/data/web/inc/ajax/qitem_details.php
index 35e599ca..1611c822 100644
--- a/data/web/inc/ajax/qitem_details.php
+++ b/data/web/inc/ajax/qitem_details.php
@@ -127,6 +127,7 @@ elseif (!empty($_GET['id']) && ctype_alnum($_GET['id'])) {
     $data['fuzzy_hashes'] = json_decode($mailc['fuzzy_hashes']);
     // Get text/plain content
     $data['text_plain'] = $mail_parser->getMessageBody('text');
+    if (!json_encode($data['text_plain'])) $data['text_plain'] = '';
     // Get html content and convert to text
     $data['text_html'] = $html2text->convert($mail_parser->getMessageBody('html'));
     if (empty($data['text_plain']) && empty($data['text_html'])) {
diff --git a/docker-compose.yml b/docker-compose.yml
index 5f6db027..0a35e97d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -76,7 +76,7 @@ services:
             - clamd
 
     rspamd-mailcow:
-      image: mailcow/rspamd:1.91
+      image: mailcow/rspamd:1.90
       stop_grace_period: 30s
       depends_on:
         - dovecot-mailcow