diff --git a/Cargo.toml b/Cargo.toml
index c7072e9..eb6448b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Steve Shi <shikangzhi@gmail.com>"]
 edition = "2021"
 license = "LGPL-3.0-only"
 description = "A drop-in num-bigint replacement based on malachite"
+rust-version = "1.74.0"
 
 [dependencies]
 malachite = "0.4.4"