diff --git a/.clippy.toml b/.clippy.toml
deleted file mode 100644
index 62ca7423..00000000
--- a/.clippy.toml
+++ /dev/null
@@ -1 +0,0 @@
-msrv = "1.56"
diff --git a/axum-core/Cargo.toml b/axum-core/Cargo.toml
index 4d6e74e7..c97b5a4c 100644
--- a/axum-core/Cargo.toml
+++ b/axum-core/Cargo.toml
@@ -2,6 +2,7 @@
 categories = ["asynchronous", "network-programming", "web-programming"]
 description = "Core types and traits for axum"
 edition = "2021"
+rust-version = "1.56"
 homepage = "https://github.com/tokio-rs/axum"
 keywords = ["http", "web", "framework"]
 license = "MIT"
diff --git a/axum-extra/Cargo.toml b/axum-extra/Cargo.toml
index e9abc7fe..2cf7dbbb 100644
--- a/axum-extra/Cargo.toml
+++ b/axum-extra/Cargo.toml
@@ -2,6 +2,7 @@
 categories = ["asynchronous", "network-programming", "web-programming"]
 description = "Extra utilities for axum"
 edition = "2021"
+rust-version = "1.56"
 homepage = "https://github.com/tokio-rs/axum"
 keywords = ["http", "web", "framework"]
 license = "MIT"
diff --git a/axum-macros/Cargo.toml b/axum-macros/Cargo.toml
index 57850158..b5b932b7 100644
--- a/axum-macros/Cargo.toml
+++ b/axum-macros/Cargo.toml
@@ -2,6 +2,7 @@
 categories = ["asynchronous", "network-programming", "web-programming"]
 description = "Macros for axum"
 edition = "2021"
+rust-version = "1.56"
 homepage = "https://github.com/tokio-rs/axum"
 keywords = ["axum"]
 license = "MIT"
diff --git a/axum/Cargo.toml b/axum/Cargo.toml
index 4a0f88a8..20f7178a 100644
--- a/axum/Cargo.toml
+++ b/axum/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.5.10"
 categories = ["asynchronous", "network-programming", "web-programming::http-server"]
 description = "Web framework that focuses on ergonomics and modularity"
 edition = "2021"
+rust-version = "1.56"
 homepage = "https://github.com/tokio-rs/axum"
 keywords = ["http", "web", "framework"]
 license = "MIT"