diff --git a/README.md b/README.md
index 5758490b..4b8bd6c8 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 **ruma-client** is a [Matrix](https://matrix.org/) client library for [Rust](https://www.rust-lang.org/).
 
+## Minimum Rust version
+
+ruma-client requires Rust 1.34 or later.
+
 ## License
 
 [MIT](http://opensource.org/licenses/MIT)