drop Ruby 2.2 support

1 files changed, 1 insertions, 3 deletions

diff --git a/README.md b/README.md
index b05e22d..b8bba11 100644
--- a/README.md
+++ b/README.md
@@ -6,9 +6,7 @@ WARNING: Plum is currently under heavy development. You *will* encounter bugs wh
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 ## Requirements
-* Ruby
-  * Ruby 2.2 with [ALPN support patch](https://gist.github.com/rhenium/b1711edcc903e8887a51) and [ECDH support patch (r51348)](https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/51348/diff?format=diff)
-  * or latest Ruby 2.3.0-dev
+* Ruby 2.3
 * OpenSSL 1.0.2 or newer (HTTP/2 requires ALPN)
 * Optional:
   * [http_parser.rb gem](https://rubygems.org/gems/http_parser.rb) (HTTP/1.x parser; if you use "http" URI scheme)