diff --git a/README.md b/README.md
index 92a77a6..154f557 100644
--- a/README.md
+++ b/README.md
@@ -1,24 +1,14 @@
-#  CustomDNS
+# DNSecure
 
-This is a sample app that configures a DNS-over-TLS resolver to the system. `NEDNSSettingsManager`, added in iOS 14, iPadOS 14, and macOS Bug Sur, makes that possible.
+DNSecure is an utility app to configure DNSSEC for your system. It supports iOS 14, iPadOS 14, or later.
 
-## Steps to Use
+## How to activate
 
 ### In case of iOS/iPadOS
 
-1. Open this app once
 1. Open the Settings
 1. Go to "General" > "VPN & Network" > "DNS"
-1. "Automatic" is selected by default, so select "CustomDNS"
-1. Force-quit and reopen this app
-1. If "Enabled" is displayed, the configuration is successfully enabled
-
-### In case of macOS
-
-1. Open this app once
-1. Open the Preferences
-1. Go to "Network"
-1. I don't know how to use it yet
+1. "Automatic" is selected by default, so select "DNSecure"
 
 ## References