diff --git a/Cargo.toml b/Cargo.toml
index cec85ed..f166452 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "radn-rs"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.65"
 
 [workspace]