diff --git a/composer.lock b/composer.lock
index fbbeb0d..c941768 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,7 +1,7 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
     "content-hash": "89560ff5772417dc9063ea7485da9d0f",
@@ -406,28 +406,27 @@
         },
         {
             "name": "react/event-loop",
-            "version": "v0.4.3",
+            "version": "v0.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/reactphp/event-loop.git",
-                "reference": "8bde03488ee897dc6bb3d91e4e17c353f9c5252f"
+                "reference": "228178a947de1f7cd9296d691878569628288c6f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/reactphp/event-loop/zipball/8bde03488ee897dc6bb3d91e4e17c353f9c5252f",
-                "reference": "8bde03488ee897dc6bb3d91e4e17c353f9c5252f",
+                "url": "https://api.github.com/repos/reactphp/event-loop/zipball/228178a947de1f7cd9296d691878569628288c6f",
+                "reference": "228178a947de1f7cd9296d691878569628288c6f",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0"
+                "php": ">=5.3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.8"
+                "phpunit/phpunit": "~4.8.35 || ^5.7 || ^6.4"
             },
             "suggest": {
-                "ext-event": "~1.0",
-                "ext-libev": "*",
-                "ext-libevent": ">=0.1.0"
+                "ext-event": "~1.0 for ExtEventLoop",
+                "ext-pcntl": "For signal handling support when using the StreamSelectLoop"
             },
             "type": "library",
             "autoload": {
@@ -439,12 +438,12 @@
             "license": [
                 "MIT"
             ],
-            "description": "Event loop abstraction layer that libraries can use for evented I/O.",
+            "description": "ReactPHP's core reactor event loop that libraries can use for evented I/O.",
             "keywords": [
                 "asynchronous",
                 "event-loop"
             ],
-            "time": "2017-04-27T10:56:23+00:00"
+            "time": "2018-07-09T13:51:04+00:00"
         },
         {
             "name": "react/promise",