diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b11e679..2eddfe85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
-For a full diff see [`1.0.0...main`][1.0.0...main].
+For a full diff see [`1.0.1...main`][1.0.1...main].
+
+## [`1.0.1`][1.0.1]
+
+For a full diff see [`1.0.0...1.0.1`][1.0.0...1.0.1].
+
+### Fixed
+
+* Adjusted `Vendor\Composer\ConfigHashNormalizer` to ignore the `preferred-install` hash ([#425]), by [@localheinz]
 
 ## [`1.0.0`][1.0.0]
 
@@ -293,6 +301,7 @@ For a full diff see [`5d8b3e2...0.1.0`][5d8b3e2...0.1.0].
 [0.14.0]: https://github.com/ergebnis/json-normalizer/releases/tag/0.14.0
 [0.14.1]: https://github.com/ergebnis/json-normalizer/releases/tag/0.14.1
 [1.0.0]: https://github.com/ergebnis/json-normalizer/releases/tag/1.0.0
+[1.0.1]: https://github.com/ergebnis/json-normalizer/releases/tag/1.0.1
 
 [5d8b3e2...0.1.0]: https://github.com/ergebnis/json-normalizer/compare/5d8b3e2...0.1.0
 [0.1.0...0.2.0]: https://github.com/ergebnis/json-normalizer/compare/0.1.0...0.2.0
@@ -314,7 +323,8 @@ For a full diff see [`5d8b3e2...0.1.0`][5d8b3e2...0.1.0].
 [0.13.1...0.14.0]: https://github.com/ergebnis/json-normalizer/compare/0.13.1...0.14.0
 [0.14.0...0.14.1]: https://github.com/ergebnis/json-normalizer/compare/0.14.0...0.14.1
 [0.14.1...1.0.0]: https://github.com/ergebnis/json-normalizer/compare/0.14.1...1.0.0
-[1.0.0...main]: https://github.com/ergebnis/json-normalizer/compare/1.0.0...main
+[1.0.0...1.0.1]: https://github.com/ergebnis/json-normalizer/compare/1.0.0...1.0.0
+[1.0.1...main]: https://github.com/ergebnis/json-normalizer/compare/1.0.1...main
 
 [#1]: https://github.com/ergebnis/json-normalizer/pull/1
 [#2]: https://github.com/ergebnis/json-normalizer/pull/2
@@ -378,6 +388,7 @@ For a full diff see [`5d8b3e2...0.1.0`][5d8b3e2...0.1.0].
 [#384]: https://github.com/ergebnis/json-normalizer/pull/384
 [#423]: https://github.com/ergebnis/json-normalizer/pull/423
 [#424]: https://github.com/ergebnis/json-normalizer/pull/424
+[#425]: https://github.com/ergebnis/json-normalizer/pull/425
 
 [@BackEndTea]: https://github.com/BackEndTea
 [@ergebnis]: https://github.com/ergebnis
diff --git a/src/Vendor/Composer/ConfigHashNormalizer.php b/src/Vendor/Composer/ConfigHashNormalizer.php
index 85c0bdc9..b71b03fc 100644
--- a/src/Vendor/Composer/ConfigHashNormalizer.php
+++ b/src/Vendor/Composer/ConfigHashNormalizer.php
@@ -30,6 +30,16 @@ final class ConfigHashNormalizer implements NormalizerInterface
         'scripts-descriptions',
     ];
 
+    /**
+     * @phpstan-var list<string>
+     * @psalm-var list<string>
+     *
+     * @var array<int, string>
+     */
+    private static $propertiesThatShouldNotBeSorted = [
+        'preferred-install',
+    ];
+
     public function normalize(Json $json): Json
     {
         $decoded = $json->decoded();
@@ -48,7 +58,10 @@ public function normalize(Json $json): Json
         }
 
         foreach ($objectProperties as $name => $value) {
-            $decoded->{$name} = self::sortByKey($value);
+            $decoded->{$name} = self::sortByKey(
+                $name,
+                $value
+            );
         }
 
         /** @var string $encoded */
@@ -62,12 +75,17 @@ public function normalize(Json $json): Json
      *
      * @return null|array|bool|false|\stdClass|string
      */
-    private static function sortByKey($value)
+    private static function sortByKey(string $name, $value)
     {
+        if (\in_array($name, self::$propertiesThatShouldNotBeSorted, true)) {
+            return $value;
+        }
+
         if (!\is_object($value)) {
             return $value;
         }
 
+        /** @var array<string, mixed> $sorted */
         $sorted = (array) $value;
 
         if ([] === $sorted) {
@@ -76,8 +94,16 @@ private static function sortByKey($value)
 
         \ksort($sorted);
 
-        return \array_map(static function ($value) {
-            return self::sortByKey($value);
-        }, $sorted);
+        $names = \array_keys($sorted);
+
+        return \array_combine(
+            $names,
+            \array_map(static function ($value, string $name) {
+                return self::sortByKey(
+                    $name,
+                    $value
+                );
+            }, $sorted, $names)
+        );
     }
 }
diff --git a/test/Unit/Vendor/Composer/ConfigHashNormalizerTest.php b/test/Unit/Vendor/Composer/ConfigHashNormalizerTest.php
index 9cf9c0d2..e69e5062 100644
--- a/test/Unit/Vendor/Composer/ConfigHashNormalizerTest.php
+++ b/test/Unit/Vendor/Composer/ConfigHashNormalizerTest.php
@@ -196,6 +196,49 @@ public function testNormalizeSortsConfigHashRecursivelyIfPropertyExists(string $
         self::assertJsonStringEqualsJsonStringNormalized($expected->encoded(), $normalized->encoded());
     }
 
+    /**
+     * @see https://github.com/ergebnis/composer-normalize/issues/644
+     * @see https://getcomposer.org/doc/06-config.md#preferred-install
+     */
+    public function testNormalizeDoesNotSortPreferredInstall(): void
+    {
+        $json = Json::fromEncoded(
+            <<<'JSON'
+{
+  "config": {
+    "sort-packages": true,
+    "preferred-install": {
+      "foo/*": "source",
+      "bar/*": "source",
+      "*": "dist"
+    }
+  }
+}
+JSON
+        );
+
+        $expected = Json::fromEncoded(
+            <<<'JSON'
+{
+  "config": {
+    "preferred-install": {
+      "foo/*": "source",
+      "bar/*": "source",
+      "*": "dist"
+    },
+    "sort-packages": true
+  }
+}
+JSON
+        );
+
+        $normalizer = new ConfigHashNormalizer();
+
+        $normalized = $normalizer->normalize($json);
+
+        self::assertJsonStringEqualsJsonStringNormalized($expected->encoded(), $normalized->encoded());
+    }
+
     /**
      * @return \Generator<array<string>>
      */