diff --git a/content/labs/infra/2019-04-14_how_to_use_Lego.md b/content/labs/infra/2019-04-14_how_to_use_Lego.md
index ba47441..900a8ac 100644
--- a/content/labs/infra/2019-04-14_how_to_use_Lego.md
+++ b/content/labs/infra/2019-04-14_how_to_use_Lego.md
@@ -151,7 +151,7 @@ All DNS codes:
 More information: https://go-acme.github.io/lego/dns
 ```
 
-`route53`特有の注意事項はこちら:
+[Amazon Route 53](https://aws.amazon.com/route53/)特有の注意事項はこちら:
 
 ```
 kazu634@ip-10-0-1-234% ./lego dnshelp -c route53
@@ -181,7 +181,7 @@ Additional Configuration:
 後で書く
 
 ### AWS_HOSTED_ZONE_IDの調べ方
-`route53`で`Hosted Zone ID`の部分を調べます:
+[Amazon Route 53](https://aws.amazon.com/route53/)で`Hosted Zone ID`の部分を調べます:
 
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