diff --git a/app/controllers/dois_controller.rb b/app/controllers/dois_controller.rb
index 66dfb0745..1127759c9 100644
--- a/app/controllers/dois_controller.rb
+++ b/app/controllers/dois_controller.rb
@@ -174,6 +174,8 @@ def index
       link_checks_dc_identifier = total > 0 ? response.response.aggregations.link_checks_dc_identifier.value : nil
       link_checks_citation_doi = total > 0 ? response.response.aggregations.link_checks_citation_doi.value : nil
       links_checked = total > 0 ? response.response.aggregations.links_checked.value : nil
+      subjects = total > 0 ? facet_by_key(response.response.aggregations.subjects.buckets) : nil
+
 
       respond_to do |format|
         format.json do
@@ -197,7 +199,8 @@ def index
             "linksWithSchemaOrg" => links_with_schema_org,
             "linkChecksSchemaOrgId" => link_checks_schema_org_id,
             "linkChecksDcIdentifier" => link_checks_dc_identifier,
-            "linkChecksCitationDoi" => link_checks_citation_doi
+            "linkChecksCitationDoi" => link_checks_citation_doi,
+            subjects: subjects
           }.compact
 
           options[:links] = {
diff --git a/app/models/doi.rb b/app/models/doi.rb
index 03b1761ea..a9012ce50 100644
--- a/app/models/doi.rb
+++ b/app/models/doi.rb
@@ -324,7 +324,8 @@ def self.query_aggregations
       sources: { terms: { field: 'source', size: 15, min_doc_count: 1 } },
       this_month: { date_range: { field: 'created', time_zone: "CET", ranges: {from: beginning_of_month, to: "now/d"} } },
       this_year: { date_range: { field: 'created', time_zone: "CET", ranges: {from: beginning_of_year, to: "now/d"} } },
-      last_year: { date_range: { field: 'created', time_zone: "CET", ranges: {from: beginning_of_last_year, to: beginning_of_year} } }
+      last_year: { date_range: { field: 'created', time_zone: "CET", ranges: {from: beginning_of_last_year, to: beginning_of_year} } },
+      subjects: { terms: { field: 'subjects.subject', size: 15, min_doc_count: 1 } }
     }
   end