diff --git a/embedded-can/Cargo.toml b/embedded-can/Cargo.toml
index 22620d786..6279fa80d 100644
--- a/embedded-can/Cargo.toml
+++ b/embedded-can/Cargo.toml
@@ -2,6 +2,7 @@
 name = "embedded-can"
 version = "0.4.1"
 edition = "2021"
+rust-version = "1.56"
 
 description = "HAL traits for Controller Area Network (CAN) devices."
 categories = ["embedded", "hardware-support", "no-std"]
diff --git a/embedded-hal-bus/Cargo.toml b/embedded-hal-bus/Cargo.toml
index bfd2a754d..ab69c254f 100644
--- a/embedded-hal-bus/Cargo.toml
+++ b/embedded-hal-bus/Cargo.toml
@@ -6,6 +6,7 @@ categories = ["embedded", "hardware-support", "no-std"]
 description = "Bus/Device connection mechanisms for embedded-hal, a Hardware Abstraction Layer (HAL) for embedded systems"
 documentation = "https://docs.rs/embedded-hal-bus"
 edition = "2021"
+rust-version = "1.60"
 keywords = ["hal", "IO"]
 license = "MIT OR Apache-2.0"
 name = "embedded-hal-bus"
diff --git a/embedded-hal-nb/Cargo.toml b/embedded-hal-nb/Cargo.toml
index 66e941923..7e5e3c5a8 100644
--- a/embedded-hal-nb/Cargo.toml
+++ b/embedded-hal-nb/Cargo.toml
@@ -2,6 +2,7 @@
 name = "embedded-hal-nb"
 version = "1.0.0-rc.1"
 edition = "2021"
+rust-version = "1.56"
 
 categories = ["embedded", "hardware-support", "no-std"]
 description = "Non-blocking Hardware Abstraction Layer (HAL) for embedded systems using the `nb` crate."
diff --git a/embedded-hal/Cargo.toml b/embedded-hal/Cargo.toml
index b67a46680..fb549a7e7 100644
--- a/embedded-hal/Cargo.toml
+++ b/embedded-hal/Cargo.toml
@@ -8,6 +8,7 @@ categories = ["asynchronous", "embedded", "hardware-support", "no-std"]
 description = " A Hardware Abstraction Layer (HAL) for embedded systems "
 documentation = "https://docs.rs/embedded-hal"
 edition = "2021"
+rust-version = "1.56"
 keywords = ["hal", "IO"]
 license = "MIT OR Apache-2.0"
 name = "embedded-hal"
diff --git a/embedded-io-adapters/Cargo.toml b/embedded-io-adapters/Cargo.toml
index 4734b840f..8cf97eceb 100644
--- a/embedded-io-adapters/Cargo.toml
+++ b/embedded-io-adapters/Cargo.toml
@@ -2,6 +2,7 @@
 name = "embedded-io-adapters"
 version = "0.6.0"
 edition = "2021"
+rust-version = "1.60"
 description = "Adapters between the `embedded-io` traits and other I/O traits"
 repository = "https://github.com/rust-embedded/embedded-hal"
 readme = "README.md"
diff --git a/embedded-io/Cargo.toml b/embedded-io/Cargo.toml
index 448b752f2..e92714f7a 100644
--- a/embedded-io/Cargo.toml
+++ b/embedded-io/Cargo.toml
@@ -2,6 +2,7 @@
 name = "embedded-io"
 version = "0.6.1"
 edition = "2021"
+rust-version = "1.60"
 description = "Embedded IO traits"
 repository = "https://github.com/rust-embedded/embedded-hal"
 readme = "README.md"