diff --git a/src/Framework/Assert.php b/src/Framework/Assert.php
index 718687df74f..a14f2b99344 100644
--- a/src/Framework/Assert.php
+++ b/src/Framework/Assert.php
@@ -2107,7 +2107,7 @@ final public static function fileExists(): FileExists
         return new FileExists;
     }
 
-    final public static function greaterThan(mixed $value): GreaterThan
+    final public static function greaterThan(float|int $value): GreaterThan
     {
         return new GreaterThan($value);
     }