diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 79571cc..48a6043 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -101,14 +101,14 @@ jobs:
         args: --features "batch_deterministic"
 
   msrv:
-    name: Current MSRV is 1.41
+    name: Current MSRV is 1.56.1
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: 1.41
+        toolchain: 1.56.1
         override: true
     - uses: actions-rs/cargo@v1
       with:
@@ -128,4 +128,4 @@ jobs:
       with:
         command: bench
         # This filter selects no benchmarks, so we don't run any, only build them.
-        args: --features "batch" "DONTRUNBENCHMARKS"
+        args: --features "batch" "nonexistentbenchmark"
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..dd49936
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## Unreleased
+
+### Changes
+* Bumped MSRV from 1.41 to 1.56.1
+* Removed `ExpandedSecretKey` API ((#205)[https://github.com/dalek-cryptography/ed25519-dalek/pull/205])
diff --git a/Cargo.toml b/Cargo.toml
index d01172d..771ac50 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ed25519-dalek"
 version = "1.0.1"
-edition = "2018"
+edition = "2021"
 authors = ["isis lovecruft <isis@patternsinthevoid.net>"]
 readme = "README.md"
 license = "BSD-3-Clause"
@@ -30,7 +30,7 @@ rand_core = { version = "0.5", default-features = false, optional = true }
 serde_crate = { package = "serde", version = "1.0", default-features = false, optional = true }
 serde_bytes = { version = "0.11", optional = true }
 sha2 = { version = "0.9", default-features = false }
-zeroize = { version = "~1.3", default-features = false }
+zeroize = { version = "1", default-features = false }
 
 [dev-dependencies]
 hex = "^0.4"
diff --git a/README.md b/README.md
index fabd832..5cde9f8 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,15 @@ Documentation is available [here](https://docs.rs/ed25519-dalek).
 
 To install, add the following to your project's `Cargo.toml`:
 
-```toml
-[dependencies.ed25519-dalek]
-version = "1"
-```
+# Minimum Supported Rust Version
+
+This crate requires Rust 1.56.1 at a minimum. 1.x releases of this crate supported an MSRV of 1.41.
+
+In the future, MSRV changes will be accompanied by a minor version bump.
+
+# Changelog
+
+See [CHANGELOG.md](CHANGELOG.md) for a list of changes made in past version of this crate.
 
 # Benchmarks
 
diff --git a/benches/ed25519_benchmarks.rs b/benches/ed25519_benchmarks.rs
index 125e718..043a198 100644
--- a/benches/ed25519_benchmarks.rs
+++ b/benches/ed25519_benchmarks.rs
@@ -21,9 +21,8 @@ mod ed25519_benches {
     use ed25519_dalek::PublicKey;
     use ed25519_dalek::Signature;
     use ed25519_dalek::Signer;
-    use ed25519_dalek::verify_batch;
-    use rand::thread_rng;
     use rand::prelude::ThreadRng;
+    use rand::thread_rng;
 
     fn sign(c: &mut Criterion) {
         let mut csprng: ThreadRng = thread_rng();
@@ -38,9 +37,9 @@ mod ed25519_benches {
         let keypair: Keypair = Keypair::generate(&mut csprng);
         let msg: &[u8] = b"";
         let sig: Signature = keypair.sign(msg);
-        
+
         c.bench_function("Ed25519 signature verification", move |b| {
-                         b.iter(| | keypair.verify(msg, &sig))
+            b.iter(|| keypair.verify(msg, &sig))
         });
     }
 
@@ -51,7 +50,7 @@ mod ed25519_benches {
         let sig: Signature = keypair.sign(msg);
 
         c.bench_function("Ed25519 strict signature verification", move |b| {
-                         b.iter(| | keypair.verify_strict(msg, &sig))
+            b.iter(|| keypair.verify_strict(msg, &sig))
         });
     }
 
@@ -62,7 +61,8 @@ mod ed25519_benches {
             "Ed25519 batch signature verification",
             |b, &&size| {
                 let mut csprng: ThreadRng = thread_rng();
-                let keypairs: Vec<Keypair> = (0..size).map(|_| Keypair::generate(&mut csprng)).collect();
+                let keypairs: Vec<Keypair> =
+                    (0..size).map(|_| Keypair::generate(&mut csprng)).collect();
                 let msg: &[u8] = b"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
                 let messages: Vec<&[u8]> = (0..size).map(|_| msg).collect();
                 let signatures: Vec<Signature> =
@@ -80,11 +80,11 @@ mod ed25519_benches {
         let mut csprng: ThreadRng = thread_rng();
 
         c.bench_function("Ed25519 keypair generation", move |b| {
-                         b.iter(| | Keypair::generate(&mut csprng))
+            b.iter(|| Keypair::generate(&mut csprng))
         });
     }
 
-    criterion_group!{
+    criterion_group! {
         name = ed25519_benches;
         config = Criterion::default();
         targets =
@@ -96,6 +96,4 @@ mod ed25519_benches {
     }
 }
 
-criterion_main!(
-    ed25519_benches::ed25519_benches,
-);
+criterion_main!(ed25519_benches::ed25519_benches);