diff --git a/composer.json b/composer.json
index a889b09caa9..953c15e98af 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
 		"ondrejmirtes/better-reflection": "6.11.0.1",
 		"phpstan/php-8-stubs": "0.3.62",
 		"phpstan/phpdoc-parser": "1.22.1",
-		"react/async": "^3",
+		"react/async": "^4",
 		"react/child-process": "^0.6.4",
 		"react/dns": "^1.10",
 		"react/event-loop": "^1.2",
diff --git a/composer.lock b/composer.lock
index f872ecf451a..c56b3118e44 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "3f067046018d484e61f3d369e2b0ad12",
+    "content-hash": "675ae2ade74e3cc27e3bae3b4fb2c40f",
     "packages": [
         {
             "name": "clue/ndjson-react",
@@ -2401,31 +2401,35 @@
         },
         {
             "name": "react/async",
-            "version": "v3.0.0",
+            "version": "v4.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/reactphp/async.git",
-                "reference": "3c3b812be77aec14bf8300b052ba589c9a5bc95b"
+                "reference": "b9641ac600b4b144e71a87dcf1be4d41dd3a3548"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/reactphp/async/zipball/3c3b812be77aec14bf8300b052ba589c9a5bc95b",
-                "reference": "3c3b812be77aec14bf8300b052ba589c9a5bc95b",
+                "url": "https://api.github.com/repos/reactphp/async/zipball/b9641ac600b4b144e71a87dcf1be4d41dd3a3548",
+                "reference": "b9641ac600b4b144e71a87dcf1be4d41dd3a3548",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.1",
+                "php": ">=8.1",
                 "react/event-loop": "^1.2",
                 "react/promise": "^3.0 || ^2.8 || ^1.2.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "^9.3 || ^7.5"
+                "phpstan/phpstan": "1.10.18",
+                "phpunit/phpunit": "^9.5"
             },
             "type": "library",
             "autoload": {
                 "files": [
                     "src/functions_include.php"
-                ]
+                ],
+                "psr-4": {
+                    "React\\Async\\": "src/"
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -2453,26 +2457,22 @@
                     "homepage": "https://cboden.dev/"
                 }
             ],
-            "description": "Async utilities for ReactPHP",
+            "description": "Async utilities and fibers for ReactPHP",
             "keywords": [
                 "async",
                 "reactphp"
             ],
             "support": {
                 "issues": "https://github.com/reactphp/async/issues",
-                "source": "https://github.com/reactphp/async/tree/v3.0.0"
+                "source": "https://github.com/reactphp/async/tree/v4.1.0"
             },
             "funding": [
                 {
-                    "url": "https://github.com/WyriHaximus",
-                    "type": "github"
-                },
-                {
-                    "url": "https://github.com/clue",
-                    "type": "github"
+                    "url": "https://opencollective.com/reactphp",
+                    "type": "open_collective"
                 }
             ],
-            "time": "2022-07-11T14:17:23+00:00"
+            "time": "2023-06-22T14:10:50+00:00"
         },
         {
             "name": "react/cache",