diff --git a/tasks/redis.rake b/tasks/redis.rake
index d8bb647..217a62e 100644
--- a/tasks/redis.rake
+++ b/tasks/redis.rake
@@ -39,5 +39,5 @@ task :redis do
 
   REDIS.set('rubies:api:last_update', { last_update: last_update }.to_json)
 
-  puts "#{last_update}: Redis OK | #{benchmark.round(2)}s | #{REDIS.dbsize} items"
+  puts "#{last_update}: Redis OK | #{format('%.2f', benchmark)}s | #{REDIS.dbsize} items"
 end