diff --git a/Cargo.toml b/Cargo.toml
index 93d542f..2a70413 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ license = "GPL-2.0-or-later"
 repository = "https://github.com/danobi/prr"
 version = "0.19.0"
 edition = "2021"
+rust-version = "1.78.0"
 build = "build.rs"
 
 [dependencies]