diff --git a/README.md b/README.md
index 79297815..6b5f05d2 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,10 @@
 
 **ruma-events** contains serializable types for the events in the [Matrix](https://matrix.org/) specification that can be shared by client and server code.
 
+## Minimum Rust version
+
+ruma-events requires Rust 1.34 or later.
+
 ## Documentation
 
 ruma-events has [comprehensive documentation](https://docs.rs/ruma-events) available on docs.rs.