diff --git a/README.md b/README.md
index bb2c7d1..e10b64e 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
 Rust version of [libphonenumber](https://github.com/googlei18n/libphonenumber).
+We currently require 1.58.0 as minimum supported Rust version (MSRV).
 
 ## Usage