diff --git a/Filer-Benchmark.md b/Filer-Benchmark.md
index 649b86d..17f16b8 100644
--- a/Filer-Benchmark.md
+++ b/Filer-Benchmark.md
@@ -20,7 +20,7 @@ So not only it is fairly slow, but also it is expensive to use S3 as a key-value
 ### SeaweedFS Benefits
 The databases usually is much more expensive than SeaweedFS for the same capacity. It would be nice to to quickly store and access files with unlimited disk space, and only store a file name in the main database.
 
-SeaweedFS has no additional cost for API access, as long as you setup the SeaweedFS cluster. For example, it is a fixed monthly cost if running on EC2 instances. You do not need to worry about unmanageable API costs.
+SeaweedFS has no additional costs for API access, as long as you setup the SeaweedFS cluster. For example, it is a fixed monthly cost if running on EC2 instances. You do not need to worry about unmanageable API costs.
 
 And SeaweedFS can offload less-accessed data to S3 with [[Cloud Tier]], so it literally has unlimited storages.