diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75cdab2..5d5ad7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
-## 0.2.3 (unreleased)
+## 0.3.0 (unreleased)
 
 - Removed dependency
+- Updated Rust edition to 2021
 
 ## 0.2.2 (2022-09-23)
 
diff --git a/Cargo.toml b/Cargo.toml
index 71d03bd..7497155 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,8 @@ description = "Large-scale sparse matrix factorization for Rust"
 repository = "https://github.com/ankane/libmf-rust"
 license = "BSD-3-Clause"
 authors = ["Andrew Kane <andrew@ankane.org>"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56.0"
 readme = "README.md"
 exclude = ["vendor/libmf/demo/*", "vendor/libmf/windows/*"]
 links = "mf"