diff --git a/composer.json b/composer.json
index 99bfa7ce..614e7099 100644
--- a/composer.json
+++ b/composer.json
@@ -41,7 +41,7 @@
         "mikey179/vfsstream": "^1.6.8",
         "phpstan/phpstan": "^0.12.82",
         "phpunit/phpunit": "^9.5.4",
-        "vimeo/psalm": "^4.6.4"
+        "vimeo/psalm": "^4.7.0"
     },
     "config": {
         "optimize-autoloader": true,
diff --git a/composer.lock b/composer.lock
index 9f0a7615..6dc181b0 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": "3236ca0d1f6d9d302fc448301034cee9",
+    "content-hash": "8c71375ba1799fdf56adc7cad1a0567c",
     "packages": [
         {
             "name": "nikic/php-parser",
@@ -1106,16 +1106,16 @@
         },
         {
             "name": "amphp/byte-stream",
-            "version": "v1.8.0",
+            "version": "v1.8.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/byte-stream.git",
-                "reference": "f0c20cf598a958ba2aa8c6e5a71c697d652c7088"
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/f0c20cf598a958ba2aa8c6e5a71c697d652c7088",
-                "reference": "f0c20cf598a958ba2aa8c6e5a71c697d652c7088",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/acbd8002b3536485c997c4e019206b3f10ca15bd",
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd",
                 "shasum": ""
             },
             "require": {
@@ -1171,9 +1171,15 @@
             "support": {
                 "irc": "irc://irc.freenode.org/amphp",
                 "issues": "https://github.com/amphp/byte-stream/issues",
-                "source": "https://github.com/amphp/byte-stream/tree/master"
+                "source": "https://github.com/amphp/byte-stream/tree/v1.8.1"
             },
-            "time": "2020-06-29T18:35:05+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/amphp",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-03-30T17:13:30+00:00"
         },
         {
             "name": "composer/package-versions-deprecated",
@@ -1331,16 +1337,16 @@
         },
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-            "version": "1.4.5",
+            "version": "1.4.6",
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                 "url": "https://github.com/composer/xdebug-handler.git",
-                "reference": "f28d44c286812c714741478d968104c5e604a1d4"
+                "reference": "f27e06cd9675801df441b3656569b328e04aa37c"
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-                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/f28d44c286812c714741478d968104c5e604a1d4",
-                "reference": "f28d44c286812c714741478d968104c5e604a1d4",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/f27e06cd9675801df441b3656569b328e04aa37c",
+                "reference": "f27e06cd9675801df441b3656569b328e04aa37c",
                 "shasum": ""
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             "require": {
@@ -1348,7 +1354,8 @@
                 "psr/log": "^1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || 6.5 - 8"
+                "phpstan/phpstan": "^0.12.55",
+                "symfony/phpunit-bridge": "^4.2 || ^5"
             },
             "type": "library",
             "autoload": {
@@ -1374,7 +1381,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/xdebug-handler/issues",
-                "source": "https://github.com/composer/xdebug-handler/tree/1.4.5"
+                "source": "https://github.com/composer/xdebug-handler/tree/1.4.6"
             },
             "funding": [
                 {
@@ -1390,7 +1397,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-11-13T08:04:11+00:00"
+            "time": "2021-03-25T17:01:18+00:00"
         },
         {
             "name": "dealerdirect/phpcodesniffer-composer-installer",
@@ -3990,16 +3997,16 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "4.6.4",
+            "version": "4.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "97fe86c4e158b5a57c5150aa5055c38b5a809aab"
+                "reference": "d4377c0baf3ffbf0b1ec6998e8d1be2a40971005"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/97fe86c4e158b5a57c5150aa5055c38b5a809aab",
-                "reference": "97fe86c4e158b5a57c5150aa5055c38b5a809aab",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/d4377c0baf3ffbf0b1ec6998e8d1be2a40971005",
+                "reference": "d4377c0baf3ffbf0b1ec6998e8d1be2a40971005",
                 "shasum": ""
             },
             "require": {
@@ -4041,6 +4048,7 @@
                 "slevomat/coding-standard": "^6.3.11",
                 "squizlabs/php_codesniffer": "^3.5",
                 "symfony/process": "^4.3",
+                "weirdan/phpunit-appveyor-reporter": "^1.0.0",
                 "weirdan/prophecy-shim": "^1.0 || ^2.0"
             },
             "suggest": {
@@ -4088,9 +4096,9 @@
             ],
             "support": {
                 "issues": "https://github.com/vimeo/psalm/issues",
-                "source": "https://github.com/vimeo/psalm/tree/4.6.4"
+                "source": "https://github.com/vimeo/psalm/tree/4.7.0"
             },
-            "time": "2021-03-16T23:28:18+00:00"
+            "time": "2021-03-29T03:54:38+00:00"
         }
     ],
     "aliases": [],