diff --git a/Cargo.toml b/Cargo.toml
index c2688304be..bb74e80f0c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@ name        = "nix"
 description = "Rust friendly bindings to *nix APIs"
 edition     = "2018"
 version     = "0.23.0"
+rust-version = "1.46"
 authors     = ["The nix-rust Project Developers"]
 repository  = "https://github.com/nix-rust/nix"
 license     = "MIT"