diff --git a/composer.json b/composer.json
index bab9b0a..fb5c89e 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
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+        "phpunit/phpunit": "10.5.20",
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diff --git a/composer.lock b/composer.lock
index f29bd0b..86867d6 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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+    "content-hash": "265115ac7404c081f8a35272cb897642",
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     "packages-dev": [
         {
@@ -1383,16 +1383,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "10.5.19",
+            "version": "10.5.20",
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                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "c726f0de022368f6ed103e452a765d3304a996a4"
+                "reference": "547d314dc24ec1e177720d45c6263fb226cc2ae3"
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             "dist": {
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-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c726f0de022368f6ed103e452a765d3304a996a4",
-                "reference": "c726f0de022368f6ed103e452a765d3304a996a4",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/547d314dc24ec1e177720d45c6263fb226cc2ae3",
+                "reference": "547d314dc24ec1e177720d45c6263fb226cc2ae3",
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@@ -1464,7 +1464,7 @@
             "support": {
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                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.19"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.5.20"
             },
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@@ -1480,7 +1480,7 @@
                     "type": "tidelift"
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             ],
-            "time": "2024-04-17T14:06:18+00:00"
+            "time": "2024-04-24T06:32:35+00:00"
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         {
             "name": "psr/container",