diff --git a/Cargo.toml b/Cargo.toml
index 04ef936407..b59825273e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ resolver = "2"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 version = "0.30.1"
-rust-version = "1.64.0"
+rust-version = "1.70.0"
 license = "Apache-2.0 OR GPL-3.0"
 repository = "https://github.com/paritytech/subxt"
 documentation = "https://docs.rs/subxt"