diff --git a/docker/devenv/files/nginx.conf b/docker/devenv/files/nginx.conf
index 9105cee436..5a0a81f091 100644
--- a/docker/devenv/files/nginx.conf
+++ b/docker/devenv/files/nginx.conf
@@ -62,7 +62,7 @@ http {
     # are served with dynamic Open Graph metadata from the backend.
     map $http_user_agent $penpot_link_preview_agent {
         default 0;
-        ~*(slackbot|discordbot|twitterbot|facebookexternalhit|facebookcatalog|whatsapp|telegrambot|linkedinbot|skypeuripreview|pinterestbot|redditbot|embedly|iframely|mastodon|bluesky|applebot|googlebot|bingbot|bingpreview|duckduckbot) 1;
+        "~*(slackbot|discordbot|twitterbot|facebookexternalhit|facebookcatalog|whatsapp|telegrambot|linkedinbot|skypeuripreview|pinterestbot|redditbot|embedly|iframely|mastodon|bluesky|applebot|googlebot|bingbot|bingpreview|duckduckbot|mattermost-bot|opengraph[.]xyz|twitter card validator)" 1;
     }
 
     proxy_cache_path /tmp/cache/ levels=2:2 keys_zone=penpot:20m;
diff --git a/docker/images/files/nginx.conf.template b/docker/images/files/nginx.conf.template
index 3a07c16214..0451e7a24a 100644
--- a/docker/images/files/nginx.conf.template
+++ b/docker/images/files/nginx.conf.template
@@ -71,7 +71,7 @@ http {
     # are served with dynamic Open Graph metadata from the backend.
     map $http_user_agent $penpot_link_preview_agent {
         default 0;
-        ~*(slackbot|discordbot|twitterbot|facebookexternalhit|facebookcatalog|whatsapp|telegrambot|linkedinbot|skypeuripreview|pinterestbot|redditbot|embedly|iframely|mastodon|bluesky|applebot|googlebot|bingbot|bingpreview|duckduckbot) 1;
+        "~*(slackbot|discordbot|twitterbot|facebookexternalhit|facebookcatalog|whatsapp|telegrambot|linkedinbot|skypeuripreview|pinterestbot|redditbot|embedly|iframely|mastodon|bluesky|applebot|googlebot|bingbot|bingpreview|duckduckbot|mattermost-bot|opengraph[.]xyz|twitter card validator)" 1;
     }
 
     proxy_cache_path /tmp/cache/ levels=2:2 keys_zone=penpot:20m;