diff --git a/src/Formatter/SEFormatter.php b/src/Formatter/SEFormatter.php
index ee42480..e0a3c5b 100644
--- a/src/Formatter/SEFormatter.php
+++ b/src/Formatter/SEFormatter.php
@@ -14,7 +14,6 @@
  * Validates and formats postcodes in Sweden.
  *
  * Postcode format is NNN NN.
- * The lowest number is 100 00 and the highest number is 984 99.
  *
  * @see https://en.wikipedia.org/wiki/List_of_postal_codes
  * @see https://en.wikipedia.org/wiki/Postal_codes_in_Sweden
@@ -24,11 +23,7 @@ final class SEFormatter implements CountryPostcodeFormatter
     #[Override]
     public function format(string $postcode): ?string
     {
-        if (preg_match('/^[0-9]{5}$/', $postcode) !== 1) {
-            return null;
-        }
-
-        if ($postcode < '10000' || $postcode > '98499') {
+        if (preg_match('/^[1-9][0-9]{4}$/', $postcode) !== 1) {
             return null;
         }
 
diff --git a/tests/Formatter/SEFormatterTest.php b/tests/Formatter/SEFormatterTest.php
index d8b0231..aead3a7 100644
--- a/tests/Formatter/SEFormatterTest.php
+++ b/tests/Formatter/SEFormatterTest.php
@@ -26,7 +26,8 @@ public static function providerFormat(): array
             ['10000', '100 00'],
             ['12345', '123 45'],
             ['98499', '984 99'],
-            ['98500', null],
+            ['98531', '985 31'],
+            ['98631', '986 31'],
             ['123456', null],
 
             ['A', null],