diff --git a/Configuration/Services.yaml b/Configuration/Services.yaml
index 64c4626..f6802c2 100644
--- a/Configuration/Services.yaml
+++ b/Configuration/Services.yaml
@@ -57,7 +57,8 @@ services:
       $rule: >
           not (context.getAspect("backend.user").isLoggedIn())
           and not (request.getHeader("User-Agent")[0] matches "/^Wget|TYPO3|TYPO3 linkvalidator/")
-          and not (request.getHeader("User-Agent")[0] matches "/Googlebot|Bingbot|bingbot|Slurp|DuckDuckBot|Baiduspider|YandexBot|Sogou|Exabot|NextCloud-News|Feedly|XING FeedReader|CCBot|SemrushBot|SEOkicks|Twitterbot|Seekport Crawler|SemanticScholarBot|curl/")
+          and not (request.getHeader("User-Agent")[0] matches "/Googlebot|Bingbot|bingbot|Slurp|DuckDuckBot|Baiduspider|YandexBot|Sogou|Exabot|NextCloud-News|Feedly|XING FeedReader|CCBot|SemrushBot|SEOkicks|Twitterbot|Seekport Crawler|SemanticScholarBot|curl|ia_archiver|PaperLiBot|TrendsmapResolver|AhrefsBot|Nuzzel/")
+          and not (request.getHeader("User-Agent")[0] matches "/mattermost|Slackbot|WhatsApp/")
 
   # Dashboard Widgets