diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f4024be..861fc37 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
           - nightly
           - beta
           - stable
-          - 1.54.0
+          - 1.56.0
 
     steps:
     - uses: actions/checkout@v3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc5b6b5..05bf7a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,9 +4,10 @@
 
 - Wrap `quick_xml::XmlError` into a newtype [`#65`](https://github.com/rust-syndication/atom/pull/65)
 - Implement `std::error::Error` for `XmlError`. Mark helper traits as `pub(crate)` to prevent their accidental leakage to public API [`#66`](https://github.com/rust-syndication/atom/pull/66)
-- Bump MSRV (Minimum Supported Rust Version) from 1.40.0 to 1.54.0 [`#66`](https://github.com/rust-syndication/atom/pull/66) and [`#69`](https://github.com/rust-syndication/atom/pull/69)
+- Bump MSRV (Minimum Supported Rust Version) from 1.40.0 to 1.56.0 [`#66`](https://github.com/rust-syndication/atom/pull/66) and [`#69`](https://github.com/rust-syndication/atom/pull/69) and [`#74`](https://github.com/rust-syndication/atom/pull/74)
 - Upgrade `quick_xml` to `0.27` and `derive_builder` to `0.12` [`#67`](https://github.com/rust-syndication/atom/pull/67)
 - Allow to configure emitted XML [`#70`](https://github.com/rust-syndication/atom/pull/70)
+- Switch to Rust 2021 Edition [`#74`](https://github.com/rust-syndication/atom/pull/74)
 
 ## 0.11.0 - 2021-10-20
 
diff --git a/Cargo.toml b/Cargo.toml
index ad151fd..48efd8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "atom_syndication"
 version = "0.11.0"
 authors = ["James Hurst <jh.jameshurst@gmail.com>"]
-edition = "2018"
+edition = "2021"
 description = "Library for serializing the Atom web content syndication format"
 repository = "https://github.com/rust-syndication/atom"
 documentation = "https://docs.rs/atom_syndication/"
diff --git a/README.md b/README.md
index 7b31238..99d2376 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Library for serializing the Atom web content syndication format.
 
 [Documentation](https://docs.rs/atom_syndication/)
 
-This crate requires *Rustc version 1.54.0 or greater*.
+This crate requires *Rustc version 1.56.0 or greater*.
 
 ## Usage