diff --git a/Preferred-Chain.md b/Preferred-Chain.md
index d7d1314..77c7c7d 100644
--- a/Preferred-Chain.md
+++ b/Preferred-Chain.md
@@ -2,7 +2,7 @@ Using `--preferred-chain` to select alternate chain.
 
 If the ACME CA provides multiple cert chain, you can use `--preferred-chain` to select one. Otherwise, it will get the default chain.
 
-1. For Letsencrpt.org Staging Server:
+1. For letsencrypt.org Staging Server:
 
     There are 2 chains provided: