diff --git a/documentation/app-transport-security/index.md b/documentation/app-transport-security/index.md
index de67aac..5844473 100644
--- a/documentation/app-transport-security/index.md
+++ b/documentation/app-transport-security/index.md
@@ -7,7 +7,7 @@ title: Sparkle App Transport Security
 
 Apple has deprecated insecure HTTP in OS X 10.11 (El Capitan). Applications compiled with 10.11 SDK are by default **blocked from using HTTP** and will not be able to download any updates over HTTP. You **must** either:
 
-* Switch to HTTPS entirely. Change the appcast URL in Info.plist and download URLs in the appcast to use HTTPS. This is recommended, and you can get free certificates from [Let's encrypt](https://letsencrypt.org/).
+* Switch to HTTPS entirely. Change the appcast URL in Info.plist and download URLs in the appcast to use HTTPS. This is recommended, and you can get free certificates from [Let's Encrypt](https://letsencrypt.org/).
 
 * Add an exception to Info.plist in your app if you can't stop using HTTP yet. [The exception properties are in Apple's documentation](https://developer.apple.com/library/prerelease/mac/technotes/App-Transport-Security-Technote/).