diff --git a/interfaces/CHANGELOG.md b/interfaces/CHANGELOG.md
index 4c405f6d..601fda9a 100644
--- a/interfaces/CHANGELOG.md
+++ b/interfaces/CHANGELOG.md
@@ -22,7 +22,7 @@ All Notable changes to `League\Uri\Interfaces` will be documented in this file
 
 ### Fixed
 
-- None
+- `UriString::parse` will fail if the URI contains whitespace.
 
 ### Deprecated
 
diff --git a/interfaces/UriString.php b/interfaces/UriString.php
index 59cb8571..6c33a754 100644
--- a/interfaces/UriString.php
+++ b/interfaces/UriString.php
@@ -82,7 +82,7 @@ final class UriString
      *
      * @var string
      */
-    private const REGEXP_INVALID_URI_CHARS = '/[\x00-\x1f\x7f]/';
+    private const REGEXP_INVALID_URI_CHARS = '/[\x00-\x1f\x7f\s]/';
 
     /**
      * RFC3986 regular expression URI splitter.
@@ -486,6 +486,7 @@ private static function resolvePathAndQuery(array $uri, array $baseUri): array
     public static function parse(Stringable|string|int $uri): array
     {
         $uri = (string) $uri;
+
         if (isset(self::URI_SHORTCUTS[$uri])) {
             /** @var ComponentMap $components */
             $components = [...self::URI_COMPONENTS, ...self::URI_SHORTCUTS[$uri]];
diff --git a/interfaces/UriStringTest.php b/interfaces/UriStringTest.php
index 3d0ec46a..cb76d4cb 100644
--- a/interfaces/UriStringTest.php
+++ b/interfaces/UriStringTest.php
@@ -11,8 +11,10 @@
 
 namespace League\Uri;
 
+use League\Uri\Contracts\UriException;
 use League\Uri\Exceptions\SyntaxError;
 use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
 use Stringable;
 
@@ -1027,4 +1029,22 @@ public static function resolveProvider(): array
             'not same origin'         => [self::BASE_URI, 'ftp://a/b/c/d', 'ftp://a/b/c/d'],
         ];
     }
+
+    #[Test]
+    #[DataProvider('invalidUriWithWhitespaceProvider')]
+    public function it_fails_parsing_uri_string_with_whitespace(string $uri): void
+    {
+        $this->expectException(UriException::class);
+
+        UriString::parse($uri);
+    }
+
+    public static function invalidUriWithWhitespaceProvider(): iterable
+    {
+        yield 'uri containing only whitespaces' => ['uri' => '     '];
+        yield 'uri stating with whitespace' => ['uri' => '    https://a/b?c'];
+        yield 'uri ending with whitespace' => ['uri' => 'https://a/b?c   '];
+        yield 'uri surrounded with whitespace' => ['uri' => '   https://a/b?c   '];
+        yield 'uri containing with whitespace' => ['uri' => 'https://a/b ?c'];
+    }
 }