diff --git a/Cargo.toml b/Cargo.toml
index 95df24d9..e4e2d6a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ name = "oha"
 readme = "README.md"
 repository = "https://github.com/hatoo/oha"
 version = "1.4.3"
+rust-version = "1.77"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html