diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2bef7f0..e57de79 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,14 +6,13 @@ on:
     branches:
       - master
   schedule:
-    - cron: '30 18 * * 5'  # Every Friday at 18:30 UTC
+    - cron: "30 18 * * 5" # Every Friday at 18:30 UTC
 
 env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: -D warnings
 
 jobs:
-
   build:
     name: Build on ${{ matrix.os }} (${{ matrix.rust }})
     runs-on: ${{ matrix.os }}
@@ -61,3 +60,21 @@ jobs:
         env:
           RUSTDOCFLAGS: --deny rustdoc::broken_intra_doc_links
         run: cargo doc --all-features --no-deps
+
+  format:
+    name: Format
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # We use an unstable rustfmt feature and we thus need the
+      # nightly channel to enforce the formatting.
+      - name: Setup Rust nightly
+        run: rustup default nightly
+
+      - name: Install rustfmt
+        run: rustup component add rustfmt
+
+      - name: Check Formatting
+        uses: dprint/check@v2.2
diff --git a/.github/workflows/prepare-release.yml b/.github/workflows/prepare-release.yml
index a157cd8..6b4ee09 100644
--- a/.github/workflows/prepare-release.yml
+++ b/.github/workflows/prepare-release.yml
@@ -3,7 +3,7 @@ name: Prepare Release PR
 on:
   push:
     branches:
-      - 'release-*'
+      - "release-*"
 
 jobs:
   prepare-release:
diff --git a/Cargo.toml b/Cargo.toml
index 6cb41b8..55cf80e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,14 +2,14 @@
 name = "version-sync"
 version = "0.9.4"
 authors = ["Martin Geisler <martin@geisler.net>"]
-description = "Crate for ensuring that version numbers in README files and other files are kept in sync with the crate version."
+categories = ["development-tools", "rust-patterns"]
 documentation = "https://docs.rs/version-sync/"
-repository = "https://github.com/mgeisler/version-sync"
-readme = "README.md"
+edition = "2021"
 keywords = ["version"]
-categories = ["development-tools", "rust-patterns"]
 license = "MIT"
-edition = "2021"
+readme = "README.md"
+repository = "https://github.com/mgeisler/version-sync"
+description = "Crate for ensuring that version numbers in README files and other files are kept in sync with the crate version."
 
 [features]
 default = ["markdown_deps_updated", "html_root_url_updated", "contains_regex"]
@@ -18,13 +18,13 @@ html_root_url_updated = ["url", "semver", "syn", "proc-macro2"]
 contains_regex = ["regex", "semver"]
 
 [dependencies]
+proc-macro2 = { version = "1.0.36", default-features = false, features = ["span-locations"], optional = true }
 pulldown-cmark = { version = "0.9.1", default-features = false, optional = true }
+regex = { version = "1.5.4", default-features = false, features = ["std", "unicode"], optional = true }
 semver = { version = "1.0.5", optional = true }
 syn = { version = "2.0.15", default-features = false, features = ["parsing", "printing", "full"], optional = true }
-proc-macro2 = { version = "1.0.36", default-features = false, features = ["span-locations"], optional = true }
 toml = { version = "0.7.8", optional = true }
 url = { version = "2.2.2", optional = true }
-regex = { version = "1.5.4", default-features = false, features = ["std", "unicode"], optional = true }
 
 [dev-dependencies]
 tempfile = "3.3.0"
diff --git a/README.md b/README.md
index e5e16b9..6502732 100644
--- a/README.md
+++ b/README.md
@@ -5,20 +5,22 @@
 [![](https://img.shields.io/crates/v/version-sync.svg)][crates-io]
 [![](https://docs.rs/version-sync/badge.svg)][api-docs]
 
-Rust projects typically reference the crate version number in several
-places, such as the `README.md` file. The version-sync crate makes it
-easy to add an integration test that checks that `README.md` is
-updated when the crate version changes.
+Rust projects typically reference the crate version number in several places,
+such as the `README.md` file. The version-sync crate makes it easy to add an
+integration test that checks that `README.md` is updated when the crate version
+changes.
 
 ## Usage
 
 Add this to your `Cargo.toml`:
+
 ```toml
 [dev-dependencies]
 version-sync = "0.9"
 ```
 
 Then create a `tests/version-numbers.rs` file with:
+
 ```rust
 #[test]
 fn test_readme_deps() {
@@ -31,10 +33,10 @@ fn test_html_root_url() {
 }
 ```
 
-This integration test will ensure that the dependencies mentioned in
-your `README.md` file are kept in sync with your crate version and
-that your `html_root_url` points to the correct documentation on
-docs.rs. If everything is well, the test passes:
+This integration test will ensure that the dependencies mentioned in your
+`README.md` file are kept in sync with your crate version and that your
+`html_root_url` points to the correct documentation on docs.rs. If everything is
+well, the test passes:
 
 ```
 $ cargo test
@@ -48,12 +50,11 @@ test test_html_root_url ... ok
 test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured
 ```
 
-If the README or `html_root_url` is out of sync with the crate
-version, the tests fail. In this example, the crate is called
-`your-crate` and the version number in `Cargo.toml` has been changed
-to 0.2.0 while the `README.md` and `html_root_url` still use 0.1.2.
-The tests now fail and the problematic TOML code and attribute are
-shown:
+If the README or `html_root_url` is out of sync with the crate version, the
+tests fail. In this example, the crate is called `your-crate` and the version
+number in `Cargo.toml` has been changed to 0.2.0 while the `README.md` and
+`html_root_url` still use 0.1.2. The tests now fail and the problematic TOML
+code and attribute are shown:
 
 ```
 $ cargo test
@@ -94,15 +95,15 @@ error: test failed
 
 ### Excluding TOML Code
 
-You can add `no_sync` to the language line in a code block to exclude
-it from the checks done by `assert_markdown_deps_updated!`:
+You can add `no_sync` to the language line in a code block to exclude it from
+the checks done by `assert_markdown_deps_updated!`:
 
-~~~markdown
+````markdown
 ```toml,no_sync
 [dependencies]
 your_crate = "0.1.2"
 ```
-~~~
+````
 
 ## Release History
 
@@ -110,48 +111,48 @@ This is a changelog describing the most important changes per release.
 
 ### Version 0.9.4 — 2021-12-14
 
-* [#115](https://github.com/mgeisler/version-sync/pull/115): Expand
-  `assert_markdown_deps_updated!` to also check version numbers such
-  as `=1.2.3`, `>1.2.3`, and `>=1.2.3`.
-* [#119](https://github.com/mgeisler/version-sync/pull/119): Add new
-  `assert_only_contains_regex!` macro which can ensure that all
-  version numbers in a file are updated.
+- [#115](https://github.com/mgeisler/version-sync/pull/115): Expand
+  `assert_markdown_deps_updated!` to also check version numbers such as
+  `=1.2.3`, `>1.2.3`, and `>=1.2.3`.
+- [#119](https://github.com/mgeisler/version-sync/pull/119): Add new
+  `assert_only_contains_regex!` macro which can ensure that all version numbers
+  in a file are updated.
 
 ### Version 0.9.3 — 2021-09-20
 
-* [#108](https://github.com/mgeisler/version-sync/pull/108): Make all
+- [#108](https://github.com/mgeisler/version-sync/pull/108): Make all
   dependencies optional. Thanks @rlee287!
-* [#109](https://github.com/mgeisler/version-sync/pull/109): Forbid
-  the use of unsafe code.
-* [#110](https://github.com/mgeisler/version-sync/pull/110): Add
-  simple `check_contains_version` function.
+- [#109](https://github.com/mgeisler/version-sync/pull/109): Forbid the use of
+  unsafe code.
+- [#110](https://github.com/mgeisler/version-sync/pull/110): Add simple
+  `check_contains_version` function.
 
 ### Version 0.9.2 — 2021-02-13
 
-* [#94](https://github.com/mgeisler/version-sync/pull/94): Update
-  pulldown-cmark to 0.8.
-* [#95](https://github.com/mgeisler/version-sync/pull/95): Fix
-  `non_fmt_panic` lint error in latest nightly.
+- [#94](https://github.com/mgeisler/version-sync/pull/94): Update pulldown-cmark
+  to 0.8.
+- [#95](https://github.com/mgeisler/version-sync/pull/95): Fix `non_fmt_panic`
+  lint error in latest nightly.
 
 ### Version 0.9.1 — 2020-07-07
 
-* [#91](https://github.com/mgeisler/version-sync/pull/91): Pull in
-  fewer dependencies. This optimizes the build time by 1-2 seconds.
-* [#92](https://github.com/mgeisler/version-sync/pull/92): Normalize
-  `\r\n` to `\n` to ensure `^` and `$` always match line boundaries.
+- [#91](https://github.com/mgeisler/version-sync/pull/91): Pull in fewer
+  dependencies. This optimizes the build time by 1-2 seconds.
+- [#92](https://github.com/mgeisler/version-sync/pull/92): Normalize `\r\n` to
+  `\n` to ensure `^` and `$` always match line boundaries.
 
 ### Version 0.9.0 — 2020-03-30
 
-Drop support for Rust 1.31.0 since our dependencies keep releasing new
-patch versions that push up the minimum required Rust version. At the
-time of writing, the code compiles with Rust 1.36, but this will
-likely become outdated soon.
+Drop support for Rust 1.31.0 since our dependencies keep releasing new patch
+patch versions that push up the minimum required Rust version. At the time of
+writing, the code compiles with Rust 1.36, but this will likely become outdated
+soon.
 
 Issues closed:
 
-* [#83][issue-83]: version-sync fails to parse TOML blocks when
-  inside blockquotes
-* [#84][issue-84]: Release update to crates.io with syn 1.0
+- [#83][issue-83]: version-sync fails to parse TOML blocks when inside
+  blockquotes
+- [#84][issue-84]: Release update to crates.io with syn 1.0
 
 ### Version 0.8.1 — 2019-04-03
 
@@ -159,94 +160,89 @@ Dependencies were relaxed to make it easier to upgrade version-sync.
 
 ### Version 0.8.0 — 2019-03-28
 
-We now use [Rust 2018][rust-2018], which means we require Rust version
-1.31.0 or later. The `assert_html_root_url_updated!` macro will again
-report accurate line numbers based on span information from the syn
-crate.
+We now use [Rust 2018][rust-2018], which means we require Rust version 1.31.0 or
+later. The `assert_html_root_url_updated!` macro will again report accurate line
+numbers based on span information from the syn crate.
 
 ### Version 0.7.0 — 2019-01-14
 
-Special characters are now correctly escaped in the `{name}` and
-`{version}` placeholders in `assert_contains_regex!`.
+Special characters are now correctly escaped in the `{name}` and `{version}`
+placeholders in `assert_contains_regex!`.
 
-Dependencies were updated and version-sync now requires Rust version
-1.27.2 or later.
+Dependencies were updated and version-sync now requires Rust version 1.27.2 or
+later.
 
 ### Version 0.6.0 — 2018-11-22
 
-You can use `assert_contains_regex!` to grep files for the current
-version number. The search is done with a regular expression where
-`{version}` is replaced with the current version number.
+You can use `assert_contains_regex!` to grep files for the current version
+number. The search is done with a regular expression where `{version}` is
+replaced with the current version number.
 
 Git dependencies are now always accepted, which means that blocks like
 
-~~~markdown
+````markdown
 ```toml
 [dependencies]
 your_crate = { git = "..." }
 ```
-~~~
+````
 
 will work without you having to add `no_sync`.
 
 Issues closed:
 
-* [#17][issue-17]: Allow to check non-markdown sources
-* [#39][issue-39]: Version 0.5 requires Rust version 1.21.0
-* [#42][issue-42]: Handle Git dependencies
-
+- [#17][issue-17]: Allow to check non-markdown sources
+- [#39][issue-39]: Version 0.5 requires Rust version 1.21.0
+- [#42][issue-42]: Handle Git dependencies
 
 ### Version 0.5.0 — 2017-11-19
 
-Dependencies were updated and version-sync now requires Rust version
-1.21 or later.
+Dependencies were updated and version-sync now requires Rust version 1.21 or
+later.
 
-Error messages from `assert_html_root_url_updated!` now again include
-line numbers (based on a heuristic until the syn crate can provide the
-information).
+Error messages from `assert_html_root_url_updated!` now again include line
+numbers (based on a heuristic until the syn crate can provide the information).
 
 ### Version 0.4.0 — 2017-11-01
 
-This release replaces the dependency on the abandoned syntex_syntax
-with with a dependency on the much lighter syn crate. This improves
-compilation speed. Unfortunately, the syn crate does not provide
-information about line numbers, so error messages are are no longer as
-good. We might be able to work around that in a later version.
+This release replaces the dependency on the abandoned syntex_syntax with with a
+dependency on the much lighter syn crate. This improves compilation speed.
+Unfortunately, the syn crate does not provide information about line numbers, so
+error messages are are no longer as good. We might be able to work around that
+in a later version.
 
 ### Version 0.3.1 — 2017-09-26
 
-This release fixes a small problem with the handling of pre-release
-identifiers.
+This release fixes a small problem with the handling of pre-release identifiers.
 
 Issues closed:
 
-* [#19][issue-19]: Pre-release identifiers were ignored.
+- [#19][issue-19]: Pre-release identifiers were ignored.
 
 ### Version 0.3.0 — 2017-09-23
 
-When checking dependencies in READMEs, TOML blocks can now be excluded
-from the check by adding `no_sync` to the language line:
+When checking dependencies in READMEs, TOML blocks can now be excluded from the
+check by adding `no_sync` to the language line:
 
-~~~markdown
+````markdown
 ```toml,no_sync
 [dependencies]
 your_crate = "0.1"
 ```
-~~~
+````
 
-This TOML block will not be checked. This is similar to `no_run` for
-Rust code blocks.
+This TOML block will not be checked. This is similar to `no_run` for Rust code
+blocks.
 
 ### Version 0.2.0 — 2017-09-20
 
-Added `assert_html_root_url_updated!` which will check that the
-`html_root_url` attribute points to the correct version of the crate
-documentation on docs.rs.
+Added `assert_html_root_url_updated!` which will check that the `html_root_url`
+attribute points to the correct version of the crate documentation on docs.rs.
 
 ### Version 0.1.3 — 2017-09-18
 
-First public release with support for finding outdated version numbers
-in `dependencies` and `dev-dependencies`.
+First public release with support for finding outdated version numbers in
+`dependencies` and `dev-dependencies`.
 
 Versions 0.1.0 to 0.1.2 were released under the name check-versions.
 
diff --git a/dprint.json b/dprint.json
new file mode 100644
index 0000000..3629e1c
--- /dev/null
+++ b/dprint.json
@@ -0,0 +1,13 @@
+{
+  "markdown": { "textWrap": "always" },
+  "exec": {
+    "commands": [{ "exts": ["rs"], "command": "rustfmt" }]
+  },
+  "excludes": ["target/"],
+  "plugins": [
+    "https://plugins.dprint.dev/exec-0.4.3.json@42343548b8022c99b1d750be6b894fe6b6c7ee25f72ae9f9082226dd2e515072",
+    "https://plugins.dprint.dev/markdown-0.16.1.wasm",
+    "https://plugins.dprint.dev/prettier-0.27.0.json@3557a62b4507c55a47d8cde0683195b14d13c41dda66d0f0b0e111aed107e2fe",
+    "https://plugins.dprint.dev/toml-0.5.4.wasm"
+  ]
+}