diff --git a/.formatter.exs b/.formatter.exs
new file mode 100644
index 0000000..fe7b600
--- /dev/null
+++ b/.formatter.exs
@@ -0,0 +1,5 @@
+# Used by "mix format"
+[
+  import_deps: [:ecto],
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/.gitignore b/.gitignore
index fa4fa86..a2c3e3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,3 @@
-mix.lock
-bench/snapshots/
-
 # The directory Mix will write compiled artifacts to.
 /_build/
 
@@ -10,7 +7,7 @@ bench/snapshots/
 # The directory Mix downloads your dependencies sources to.
 /deps/
 
-# Where 3rd-party dependencies like ExDoc output generated docs.
+# Where third-party dependencies like ExDoc output generated docs.
 /doc/
 
 # Ignore .fetch files in case you like to edit your project deps locally.
@@ -21,3 +18,13 @@ erl_crash.dump
 
 # Also ignore archive artifacts (built via "mix archive.build").
 *.ez
+
+# Ignore package tarball (built via "mix hex.build").
+ecto_ulid-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
+
+# Misc.
+mix.lock
+bench/snapshots/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60af587..88d60af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log
 
+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).
+
+## 0.3.0 (2021-04-20)
+### Changed
+* ([#5](https://github.com/TheRealReal/ecto-ulid/pull/4))
+  Support Ecto 3.2.0.
+
 ## 0.2.0 (2019-01-17)
 ### Breaking Changes
 * Minimum supported Elixir is now 1.4.
diff --git a/LICENSE b/LICENSE.md
similarity index 98%
rename from LICENSE
rename to LICENSE.md
index ffbf4b1..b9b90b8 100644
--- a/LICENSE
+++ b/LICENSE.md
@@ -1,3 +1,5 @@
+# MIT License
+
 Copyright (c) 2018 The RealReal, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining
diff --git a/README.md b/README.md
index e6cddd0..87d2744 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,11 @@
 # Ecto.ULID
 
+[![Module Version](https://img.shields.io/hexpm/v/ecto_ulid.svg)](https://hex.pm/packages/ecto_ulid)
+[![Hex Docs](https://img.shields.io/badge/hex-docs-lightgreen.svg)](https://hexdocs.pm/ecto_ulid/)
+[![Total Download](https://img.shields.io/hexpm/dt/ecto_ulid.svg)](https://hex.pm/packages/ecto_ulid)
+[![License](https://img.shields.io/hexpm/l/ecto_ulid.svg)](https://github.com/TheRealReal/ecto-ulid/blob/master/LICENSE.md)
+[![Last Updated](https://img.shields.io/github/last-commit/TheRealReal/ecto-ulid.svg)](https://github.com/TheRealReal/ecto-ulid/commits/master)
+
 An `Ecto.Type` implementation of [ULID](https://github.com/ulid/spec).
 
 `Ecto.ULID` should be compatible anywhere that `Ecto.UUID` is supported. It has been confirmed to
@@ -32,6 +38,8 @@ on your system.
 The following are results from running the benchmark on an AMD Ryzen Threadripper 1950X:
 
 ```
+mix bench
+...
 benchmark name iterations   average time
 cast/1           10000000   0.25 µs/op
 dump/1           10000000   0.50 µs/op
@@ -49,7 +57,7 @@ primary key in a database table, but it can be used for other columns just as ea
 
 ### Install
 
-Install `ecto_ulid` from Hex by adding it to the dependencies in `mix.exs`:
+Install `:ecto_ulid` from Hex by adding it to the dependencies in `mix.exs`:
 
 ```elixir
 defp deps do
@@ -119,8 +127,9 @@ Ecto.ULID.bingenerate() #=> <<1, 95, 194, 60, 108, 73, 209, 114, 136, 236, 133,
 To backfill old data, it may be helpful to pass a timestamp to `generate/1` or `bingenerate/1`. See
 the [API documentation](https://hexdocs.pm/ecto_ulid) for more details.
 
-## License
+## Copyright and License
 
-Copyright © 2018 The RealReal, Inc.
+Copyright (c) 2018 The RealReal, Inc.
 
-Distributed under the [MIT License](./LICENSE).
+This library is released under the MIT License. See the [LICENSE.md](./LICENSE.md) file
+for further details.
diff --git a/mix.exs b/mix.exs
index 384ecf5..c539781 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,19 +1,19 @@
 defmodule Ecto.ULID.Mixfile do
   use Mix.Project
 
+  @source_url "https://github.com/TheRealReal/ecto-ulid"
+  @version "0.3.0"
+
   def project do
     [
       app: :ecto_ulid,
       version: "0.3.0",
       elixir: "~> 1.4",
       start_permanent: Mix.env == :prod,
-      deps: deps(),
       name: "Ecto.ULID",
-      description: "An Ecto.Type implementation of ULID.",
+      deps: deps(),
       package: package(),
-      source_url: "https://github.com/TheRealReal/ecto-ulid",
-      homepage_url: "https://github.com/TheRealReal/ecto-ulid",
-      docs: [main: "Ecto.ULID"],
+      docs: docs()
     ]
   end
 
@@ -25,9 +25,13 @@ defmodule Ecto.ULID.Mixfile do
 
   defp package do
     [
+      description: "An Ecto.Type implementation of ULID.",
       maintainers: ["David Cuddeback"],
       licenses: ["MIT"],
-      links: %{"GitHub" => "https://github.com/TheRealReal/ecto-ulid"},
+      links: %{
+        "Changelog" => "https://hexdocs.pm/ecto_ulid/changelog.html",
+        "GitHub" => @source_url
+      },
     ]
   end
 
@@ -35,7 +39,21 @@ defmodule Ecto.ULID.Mixfile do
     [
       {:ecto, "~> 2.0 or ~> 3.0"},
       {:benchfella, "~> 0.3.5", only: [:dev, :test]},
-      {:ex_doc, "~> 0.16", only: :dev, runtime: false},
+      {:ex_doc, ">= 0.0.0", only: :dev, runtime: false},
+    ]
+  end
+
+  defp docs do
+    [
+      extras: [
+        "CHANGELOG.md": [title: "Changelog"],
+        "LICENSE.md": [title: "License"],
+        "README.md": [title: "Overview"]
+      ],
+      main: "readme",
+      source_url: @source_url,
+      source_ref: "v#{@version}",
+      formatters: ["html"]
     ]
   end
 end