diff --git a/app/lib/services.rb b/app/lib/services.rb
index 884131c1f..0c3aedaad 100644
--- a/app/lib/services.rb
+++ b/app/lib/services.rb
@@ -6,8 +6,8 @@ def self.content_store
     @content_store ||= GdsApi::ContentStore.new(Plek.new.find("content-store"))
   end
 
-  def self.cached_search(params, metric_key: "search.request_time")
-    Rails.cache.fetch(params, expires_in: 5.minutes) do
+  def self.cached_search(params, metric_key: "search.request_time", expires_in: 5.minutes)
+    Rails.cache.fetch(params, expires_in:) do
       GovukStatsd.time(metric_key) do
         search_api.search(params).to_h
       end
diff --git a/app/models/popular_list_set.rb b/app/models/popular_list_set.rb
index 5044a0625..80c001345 100644
--- a/app/models/popular_list_set.rb
+++ b/app/models/popular_list_set.rb
@@ -29,7 +29,7 @@ def search_response
       order: "-popularity",
       fields: SearchApiFields::POPULAR_BROWSE_SEARCH_FIELDS,
     }
-    Services.cached_search(params)
+    Services.cached_search(params, expires_in: 12.hours)
   rescue GdsApi::HTTPServerError
     {}
   end