diff --git a/lib/crawler_detection.rb b/lib/crawler_detection.rb
index 075375ebc90..a8892fdc769 100644
--- a/lib/crawler_detection.rb
+++ b/lib/crawler_detection.rb
@@ -4,6 +4,6 @@ module CrawlerDetection
   # added 'Swiftbot' based on https://meta.discourse.org/t/how-to-add-html-markup-or-meta-tags-for-external-search-engine/28220
 
   def self.crawler?(user_agent)
-    !/Googlebot|Mediapartners|AdsBot|curl|Twitterbot|facebookexternalhit|bingbot|Baiduspider|ia_archiver|Wayback Save Page|360Spider|Swiftbot|YandexBot/.match(user_agent).nil?
+    !/Googlebot|Mediapartners|AdsBot|curl|HTTrack|Twitterbot|facebookexternalhit|bingbot|Baiduspider|ia_archiver|Wayback Save Page|360Spider|Swiftbot|YandexBot/.match(user_agent).nil?
   end
 end