diff --git a/composer.json b/composer.json
index 174207f..0ec4128 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
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-    "phpunit/phpunit": "^9.5.27",
+    "phpunit/phpunit": "^9.5.28",
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     "react/event-loop": "^1.3.0",
     "react/promise": "^2.9.",
diff --git a/composer.lock b/composer.lock
index 789823a..2c3f8fe 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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-    "content-hash": "88f7d32b2bbd0ac6a2d7fd824a970801",
+    "content-hash": "f04bd9c165ee08ad1edc5d30fc665779",
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@@ -5002,20 +5002,20 @@
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-            "version": "9.5.27",
+            "version": "9.5.28",
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                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "a2bc7ffdca99f92d959b3f2270529334030bba38"
+                "reference": "954ca3113a03bf780d22f07bf055d883ee04b65e"
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             "dist": {
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-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/a2bc7ffdca99f92d959b3f2270529334030bba38",
-                "reference": "a2bc7ffdca99f92d959b3f2270529334030bba38",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/954ca3113a03bf780d22f07bf055d883ee04b65e",
+                "reference": "954ca3113a03bf780d22f07bf055d883ee04b65e",
                 "shasum": ""
             },
             "require": {
-                "doctrine/instantiator": "^1.3.1",
+                "doctrine/instantiator": "^1.3.1 || ^2",
                 "ext-dom": "*",
                 "ext-json": "*",
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@@ -5084,7 +5084,7 @@
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             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.27"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.28"
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             "funding": [
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@@ -5100,7 +5100,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-12-09T07:31:23+00:00"
+            "time": "2023-01-14T12:32:24+00:00"
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         {
             "name": "psalm/plugin-phpunit",