diff --git a/ubuntu/erlking.silvestris.systems.yml b/ubuntu/erlking.silvestris.systems.yml
index 4038efd..a0fb7b6 100644
--- a/ubuntu/erlking.silvestris.systems.yml
+++ b/ubuntu/erlking.silvestris.systems.yml
@@ -262,7 +262,7 @@
             fastcgi_pass php;
           }
       blockbots:
-        - if ($http_user_agent ~* (thesis-research-bot|fidget-spinner-bot) ) {
+        - if ($http_user_agent ~* (thesis-research-bot|fidget-spinner-bot|ClaudeBot) ) {
             return 403;
           }
     nginx_configs: