diff --git a/composer.json b/composer.json
index 74830a5a0f1..1314b2699e6 100644
--- a/composer.json
+++ b/composer.json
@@ -36,8 +36,7 @@
         "sebastian/diff": "^4.0",
         "spatie/array-to-xml": "^2.17.0",
         "symfony/console": "^4.1.6 || ^5.0 || ^6.0",
-        "symfony/filesystem": "^5.4 || ^6.0",
-        "symfony/polyfill-php80": "^1.25"
+        "symfony/filesystem": "^5.4 || ^6.0"
     },
     "provide": {
         "psalm/psalm": "self.version"
diff --git a/src/Psalm/Internal/CliUtils.php b/src/Psalm/Internal/CliUtils.php
index 08cdc4c2b5f..fc1f979feb6 100644
--- a/src/Psalm/Internal/CliUtils.php
+++ b/src/Psalm/Internal/CliUtils.php
@@ -71,11 +71,6 @@ public static function requireAutoloaders(
         $in_phar = Phar::running() || strpos(__NAMESPACE__, 'HumbugBox');
 
         if ($in_phar) {
-            // require this before anything else
-            $stringable_path = __DIR__ . '/../../../vendor/symfony/polyfill-php80/Resources/stubs/Stringable.php';
-            if (file_exists($stringable_path)) {
-                require_once $stringable_path;
-            }
             require_once __DIR__ . '/../../../vendor/autoload.php';
 
             // hack required for JsonMapper
diff --git a/src/Psalm/Type/MutableUnion.php b/src/Psalm/Type/MutableUnion.php
index e23576b4635..d22059efcab 100644
--- a/src/Psalm/Type/MutableUnion.php
+++ b/src/Psalm/Type/MutableUnion.php
@@ -22,14 +22,13 @@
 use Psalm\Type\Atomic\TString;
 use Psalm\Type\Atomic\TTemplateParamClass;
 use Psalm\Type\Atomic\TTrue;
-use Stringable;
 
 use function count;
 use function get_class;
 use function get_object_vars;
 use function strpos;
 
-final class MutableUnion implements TypeNode, Stringable
+final class MutableUnion implements TypeNode
 {
     use UnionTrait;
 
diff --git a/src/Psalm/Type/Union.php b/src/Psalm/Type/Union.php
index 03dea469914..90a891917b1 100644
--- a/src/Psalm/Type/Union.php
+++ b/src/Psalm/Type/Union.php
@@ -9,7 +9,6 @@
 use Psalm\Type\Atomic\TLiteralFloat;
 use Psalm\Type\Atomic\TLiteralInt;
 use Psalm\Type\Atomic\TLiteralString;
-use Stringable;
 
 use function get_object_vars;
 
@@ -40,7 +39,7 @@
  *      parent_nodes?: array<string, DataFlowNode>
  * }
  */
-final class Union implements TypeNode, Stringable
+final class Union implements TypeNode
 {
     use ImmutableNonCloneableTrait;
     use UnionTrait;