diff --git a/lib/tasks/fetch.rake b/lib/tasks/fetch.rake
index d4e569478..c2f50484e 100644
--- a/lib/tasks/fetch.rake
+++ b/lib/tasks/fetch.rake
@@ -53,7 +53,7 @@ task renew_hired_articles: :environment do
 end
 
 task clear_memory_if_too_high: :environment do
-  if Rails.cache.stats.flatten[1]["bytes"].to_i > 2000000000
+  if Rails.cache.stats.flatten[1]["bytes"].to_i > 4600000000
     Rails.cache.clear
   end
 end