diff --git a/Cargo.toml b/Cargo.toml
index 4c0e8a3..974038d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "ethereum"
-version = "0.14.0"
+version = "0.15.0"
 license = "Apache-2.0"
 authors = ["Wei Tang <hi@that.world>"]
 description = "Core block and transaction types for Ethereum."
 repository = "https://github.com/rust-blockchain/ethereum"
 keywords = ["no_std", "ethereum"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 bytes = { version = "1.0", default-features = false }