diff --git a/Optimization.md b/Optimization.md
index 9529f24..a9d6cdb 100644
--- a/Optimization.md
+++ b/Optimization.md
@@ -95,7 +95,7 @@ Customizing the needle id and/or file cookie is an acceptable behavior. "strict
 
 ## Upload large files
 
-If files are large and network is slow, the server will take time to read the file. Please increase the "-readTimeout=3" limit setting for volume server. It cut off the connection if uploading takes a longer time than the limit.
+If files are large and network is slow, the server will take time to read the file. Please increase the "-idleTimeout=30" limit setting for volume server. It cut off the connection if uploading takes a longer time than the limit.
 
 ### Upload large files with Auto Split/Merge