diff --git a/lib/pact_broker/pacts/all_pact_publications.rb b/lib/pact_broker/pacts/all_pact_publications.rb
index 4a9d557f3..261eb9292 100644
--- a/lib/pact_broker/pacts/all_pact_publications.rb
+++ b/lib/pact_broker/pacts/all_pact_publications.rb
@@ -109,7 +109,7 @@ def to_domain_without_tags
       def head_tag_names
         # Avoid circular dependency
         require 'pact_broker/pacts/latest_tagged_pact_publications'
-        LatestTaggedPactPublications.where(id: id).select(:tag_name).collect{|t| t[:tag_name]}
+        @head_tag_names ||= LatestTaggedPactPublications.where(id: id).select(:tag_name).collect{|t| t[:tag_name]}
       end
 
       def to_domain_with_content