diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20a0554e..09ef60ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-For a full diff see [`2.2.1...master`][2.2.1...master].
+For a full diff see [`2.2.2...master`][2.2.2...master].
+
+## [`2.2.2`][2.2.2]
+
+For a full diff see [`2.2.1...2.2.2`][2.2.1...2.2.2].
+
+### Changed
+
+* Updated `schema.json` ([#322]), by [@localheinz]
 
 ## [`2.2.1`][2.2.1]
 
@@ -302,6 +310,7 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [2.1.2]: https://github.com/ergebnis/composer-normalize/releases/tag/2.1.2
 [2.2.0]: https://github.com/ergebnis/composer-normalize/releases/tag/2.2.0
 [2.2.1]: https://github.com/ergebnis/composer-normalize/releases/tag/2.2.1
+[2.2.2]: https://github.com/ergebnis/composer-normalize/releases/tag/2.2.2
 
 [81bc3a8...0.1.0]: https://github.com/ergebnis/composer-normalize/compare/81bc3a8...0.1.0
 [0.1.0...0.2.0]: https://github.com/ergebnis/composer-normalize/compare/0.1.0...0.2.0
@@ -329,7 +338,8 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [2.1.1...2.1.2]: https://github.com/ergebnis/composer-normalize/compare/2.1.1...2.1.2
 [2.1.2...2.2.0]: https://github.com/ergebnis/composer-normalize/compare/2.1.2...2.2.0
 [2.2.0...2.2.1]: https://github.com/ergebnis/composer-normalize/compare/2.2.0...2.2.1
-[2.2.1...master]: https://github.com/ergebnis/composer-normalize/compare/2.2.1...master
+[2.2.1...2.2.2]: https://github.com/ergebnis/composer-normalize/compare/2.2.1...2.2.2
+[2.2.2...master]: https://github.com/ergebnis/composer-normalize/compare/2.2.2...master
 
 [#1]: https://github.com/ergebnis/composer-normalize/pull/1
 [#2]: https://github.com/ergebnis/composer-normalize/pull/2
@@ -371,6 +381,7 @@ For a full diff see [`81bc3a8...0.1.0`][81bc3a8...0.1.0].
 [#301]: https://github.com/ergebnis/composer-normalize/pull/301
 [#303]: https://github.com/ergebnis/composer-normalize/pull/303
 [#316]: https://github.com/ergebnis/composer-normalize/pull/316
+[#322]: https://github.com/ergebnis/composer-normalize/pull/322
 
 [@ergebnis]: https://github.com/ergebnis
 [@localheinz]: https://github.com/localheinz
diff --git a/resource/schema.json b/resource/schema.json
index bd04c5d5..c8310915 100644
--- a/resource/schema.json
+++ b/resource/schema.json
@@ -41,7 +41,7 @@
         "version": {
             "type": "string",
             "description": "Package version, see https://getcomposer.org/doc/04-schema.md#version for more info on valid schemes.",
-            "pattern": "^v?\\d+(((\\.\\d+)?\\.\\d+)?\\.\\d+)?"
+            "pattern": "^v?\\d+(((\\.\\d+)?\\.\\d+)?\\.\\d+)?|^dev-"
         },
         "time": {
             "type": "string",