diff --git a/composer.lock b/composer.lock
index 427b1e0191..2d42f6d302 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1566,7 +1566,7 @@
             "time": "2018-06-13T13:22:40+00:00"
         },
         {
-            "name": "jeremeamia/SuperClosure",
+            "name": "jeremeamia/superclosure",
             "version": "2.4.0",
             "source": {
                 "type": "git",
@@ -2588,26 +2588,26 @@
         },
         {
             "name": "react/promise-stream",
-            "version": "v1.1.1",
+            "version": "v1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/reactphp/promise-stream.git",
-                "reference": "00e269d611e9c9a29356aef64c07f7e513e73dc9"
+                "reference": "6384d8b76cf7dcc44b0bf3343fb2b2928412d1fe"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/reactphp/promise-stream/zipball/00e269d611e9c9a29356aef64c07f7e513e73dc9",
-                "reference": "00e269d611e9c9a29356aef64c07f7e513e73dc9",
+                "url": "https://api.github.com/repos/reactphp/promise-stream/zipball/6384d8b76cf7dcc44b0bf3343fb2b2928412d1fe",
+                "reference": "6384d8b76cf7dcc44b0bf3343fb2b2928412d1fe",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3",
                 "react/promise": "^2.1 || ^1.2",
-                "react/stream": "^1.0 || ^0.7 || ^0.6 || ^0.5 || ^0.4 || ^0.3"
+                "react/stream": "^1.0 || ^0.7 || ^0.6 || ^0.5 || ^0.4.6"
             },
             "require-dev": {
                 "clue/block-react": "^1.0",
-                "phpunit/phpunit": "^6.4 || ^5.7 || ^4.8.35",
+                "phpunit/phpunit": "^7.0 || ^6.4 || ^5.7 || ^4.8.35",
                 "react/event-loop": "^1.0 || ^0.5 || ^0.4 || ^0.3",
                 "react/promise-timer": "^1.0"
             },
@@ -2640,7 +2640,7 @@
                 "stream",
                 "unwrap"
             ],
-            "time": "2017-12-22T12:02:05+00:00"
+            "time": "2019-07-03T12:29:10+00:00"
         },
         {
             "name": "react/promise-timer",