diff --git a/ipcert.md b/ipcert.md
index 2fd5535..fc17910 100644
--- a/ipcert.md
+++ b/ipcert.md
@@ -6,7 +6,7 @@ acme.sh  --issue  -d 1.1.1.1  --w /etc/apachet/xxxxxx
 
 As the rfc 8738 requires: https://tools.ietf.org/html/rfc8738
 
-If the ip address can not be validated by dns methods. Only  http/webroot  and  alpn methods are allowded.
+The ip address can not be validated by dns methods. Only  http/webroot  and  alpn methods are allowded.