diff --git a/gpio/Cargo.toml b/gpio/Cargo.toml
index f83aaf2..8b26a3f 100644
--- a/gpio/Cargo.toml
+++ b/gpio/Cargo.toml
@@ -7,7 +7,7 @@ repository = "https://github.com/rust-vmm/vhost-device"
 readme = "README.md"
 keywords = ["gpio", "vhost", "virt", "backend"]
 license = "Apache-2.0 OR BSD-3-Clause"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/i2c/Cargo.toml b/i2c/Cargo.toml
index 5775907..755c4b5 100644
--- a/i2c/Cargo.toml
+++ b/i2c/Cargo.toml
@@ -7,7 +7,7 @@ repository = "https://github.com/rust-vmm/vhost-device"
 readme = "README.md"
 keywords = ["i2c", "vhost", "virt", "backend"]
 license = "Apache-2.0 OR BSD-3-Clause"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/rng/Cargo.toml b/rng/Cargo.toml
index dbbe28d..628902b 100644
--- a/rng/Cargo.toml
+++ b/rng/Cargo.toml
@@ -7,7 +7,7 @@ repository = "https://github.com/rust-vmm/vhost-device"
 readme = "README.md"
 keywords = ["rng", "vhost", "virt", "backend"]
 license = "Apache-2.0 OR BSD-3-Clause"
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 clap = { version = ">=3.0",  features = ["derive"] }