From c7757931b714edcfc222b9d9f5a3fff63a51f05e Mon Sep 17 00:00:00 2001
From: Richard Wei <rxwei@apple.com>
Date: Mon, 7 Feb 2022 15:54:19 -0800
Subject: [PATCH] Update readme to clarify toolchain version.

---
 README.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index f489bb95a..e6f94377c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# MatchingEngine
+# Declarative String Processing for Swift
 
 An early experimental general-purpose pattern matching engine for Swift.
 
@@ -6,3 +6,6 @@ See [Declarative String Processing Overview][decl-string]
 
 [decl-string]: Documentation/DeclarativeStringProcessing.md
 
+## Requirements
+
+- [Swift Trunk Development Snapshot](https://www.swift.org/download/#snapshots) DEVELOPMENT-SNAPSHOT-2022-02-03 or later.