diff --git a/DNS-API-Dev-Guide.md b/DNS-API-Dev-Guide.md
index 394ba78..584b73c 100644
--- a/DNS-API-Dev-Guide.md
+++ b/DNS-API-Dev-Guide.md
@@ -23,9 +23,9 @@ Here we go:
     Read it first:
     https://github.com/Neilpang/acme.sh/blob/master/dnsapi/dns_cf.sh
 
-### 2. The script file name must be `myapi.sh`
+### 2. The script file name must be `dns_myapi.sh`
 
-    The file name must be in this format: `yourApiName.sh`, in this example, it should be `myapi.sh`
+    The file name must be in this format: `dns_yourApiName.sh`, in this example, it should be `dns_myapi.sh`
 
 ### 3. The file can be placed in `acme.sh/` folder, or in `acme.sh/dnsapi/` subfolder.