diff --git a/Cargo.toml b/Cargo.toml
index b46aa56dd..05575f3cc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ documentation = "https://smithay.github.io/client-toolkit"
 repository = "https://github.com/smithay/client-toolkit"
 license = "MIT"
 edition = "2021"
+rust-version = "1.65"
 categories = ["gui"]
 keywords = ["wayland", "client"]
 description = "Toolkit for making client wayland applications."