diff --git a/README.md b/README.md
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@@ -3,7 +3,7 @@
 [![CI](https://github.com/ruby/uri/actions/workflows/test.yml/badge.svg)](https://github.com/ruby/uri/actions/workflows/test.yml)
 [![Yard Docs](https://img.shields.io/badge/docs-exist-blue.svg)](https://ruby.github.io/uri/)
 
-URI is a module providing classes to handle Uniform Resource Identifiers [RFC2396](http://tools.ietf.org/html/rfc2396).
+URI is a module providing classes to handle Uniform Resource Identifiers [RFC3986](http://tools.ietf.org/html/rfc3986).
 
 ## Features