diff --git a/manual/deploy_pro/setup_with_amazon_s3.md b/manual/deploy_pro/setup_with_amazon_s3.md
index 7cf16ee1..5d19f26c 100644
--- a/manual/deploy_pro/setup_with_amazon_s3.md
+++ b/manual/deploy_pro/setup_with_amazon_s3.md
@@ -92,7 +92,12 @@ use_https = true
 sse_c_key = XiqMSf3x5ja4LRibBbV0sVntVpdHXl3P
 ```
 
-`ssk_c_key` is a 32-byte random string.
+`sse_c_key` is a string of 32 characters.
+
+You can generate `sse_c_key` with the following command：
+```
+openssl rand -base64 24
+```
 
 ## Other Public Hosted S3 Storage