diff --git a/Cargo.toml b/Cargo.toml
index 66935ca..3dd798d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ description = "TUI gamepad tester"
 readme = "README.md"
 repository = "https://git.pixelatedw.xyz/wynd/gamo"
 license = "GPL-3.0-or-later"
+rust-version = "1.78"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html