diff --git a/composer.json b/composer.json
index 04ef41b..a1c006b 100644
--- a/composer.json
+++ b/composer.json
@@ -35,8 +35,7 @@
 
 	"autoload-dev": {
 		"psr-4": {
-			"GT\\Json\\Test\\": "./test/phpunit",
-			"Gt\\Json\\Test\\": "./test/phpunit"
+			"GT\\Json\\Test\\": "./test/phpunit"
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diff --git a/composer.lock b/composer.lock
index f1a4746..0961b46 100644
--- a/composer.lock
+++ b/composer.lock
@@ -156,16 +156,16 @@
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+                "url": "https://github.com/phpgt/DataObject.git",
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@@ -175,13 +175,14 @@
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+                "squizlabs/php_codesniffer": "^4.0"
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+                    "GT\\DataObject\\": "./src",
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@@ -197,29 +198,29 @@
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-                "source": "https://github.com/PhpGt/DataObject/tree/v1.1.0"
+                "issues": "https://github.com/phpgt/DataObject/issues",
+                "source": "https://github.com/phpgt/DataObject/tree/v1.1.1"
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-                    "url": "https://github.com/phpgt",
+                    "url": "https://github.com/sponsors/phpgt",
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-            "time": "2025-02-14T16:43:15+00:00"
+            "time": "2026-04-21T12:24:50+00:00"
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-                "reference": "a0d339103828791989cbb81f760d252f3c2f8b8c"
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@@ -234,6 +235,7 @@
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+                    "GT\\TypeSafeGetter\\": "./src",
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@@ -250,7 +252,7 @@
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-                "source": "https://github.com/phpgt/TypeSafeGetter/tree/v1.3.3"
+                "source": "https://github.com/phpgt/TypeSafeGetter/tree/v1.3.4"
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@@ -258,34 +260,35 @@
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-            "time": "2026-03-10T22:28:01+00:00"
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-                "phpstan/phpstan-strict-rules": "^1 || ^2",
-                "phpunit/phpunit": "^8 || ^9"
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+                "phpstan/phpstan-deprecation-rules": "^2",
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@@ -323,7 +326,7 @@
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@@ -2420,34 +2402,34 @@
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@@ -2475,7 +2457,7 @@
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@@ -2560,7 +2541,7 @@
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@@ -2606,7 +2587,7 @@
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@@ -2642,34 +2623,38 @@
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@@ -2780,7 +2765,7 @@
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@@ -2804,16 +2789,16 @@
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                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "6a21eb99c6973357967f6ce3708cd55a6bec6315"
+                "reference": "d3d318bad5e7a1bfbd026009c8bfb8d8f99ae6b6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/6a21eb99c6973357967f6ce3708cd55a6bec6315",
-                "reference": "6a21eb99c6973357967f6ce3708cd55a6bec6315",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/d3d318bad5e7a1bfbd026009c8bfb8d8f99ae6b6",
+                "reference": "d3d318bad5e7a1bfbd026009c8bfb8d8f99ae6b6",
                 "shasum": ""
             },
             "require": {
@@ -2865,7 +2850,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.36.0"
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.38.2"
             },
             "funding": [
                 {
@@ -2885,20 +2870,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-04-10T17:25:58+00:00"
+            "time": "2026-05-27T06:59:30+00:00"
         },
         {
             "name": "symfony/service-contracts",
-            "version": "v3.6.1",
+            "version": "v3.7.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "45112560a3ba2d715666a509a0bc9521d10b6c43"
+                "reference": "c0a284bab1ed8aa0417e3d69250ab437739563a0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/45112560a3ba2d715666a509a0bc9521d10b6c43",
-                "reference": "45112560a3ba2d715666a509a0bc9521d10b6c43",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/c0a284bab1ed8aa0417e3d69250ab437739563a0",
+                "reference": "c0a284bab1ed8aa0417e3d69250ab437739563a0",
                 "shasum": ""
             },
             "require": {
@@ -2916,7 +2901,7 @@
                     "name": "symfony/contracts"
                 },
                 "branch-alias": {
-                    "dev-main": "3.6-dev"
+                    "dev-main": "3.7-dev"
                 }
             },
             "autoload": {
@@ -2952,7 +2937,7 @@
                 "standards"
             ],
             "support": {
-                "source": "https://github.com/symfony/service-contracts/tree/v3.6.1"
+                "source": "https://github.com/symfony/service-contracts/tree/v3.7.1"
             },
             "funding": [
                 {
@@ -2972,30 +2957,30 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2025-07-15T11:30:57+00:00"
+            "time": "2026-06-16T09:55:08+00:00"
         },
         {
             "name": "symfony/var-exporter",
-            "version": "v6.4.36",
+            "version": "v7.4.14",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-exporter.git",
-                "reference": "f9c4a9695a9e2bbc65c920e147d8d7ae28f8d79a"
+                "reference": "0118811b1d59f323bf131250b3fb919febfece28"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/f9c4a9695a9e2bbc65c920e147d8d7ae28f8d79a",
-                "reference": "f9c4a9695a9e2bbc65c920e147d8d7ae28f8d79a",
+                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/0118811b1d59f323bf131250b3fb919febfece28",
+                "reference": "0118811b1d59f323bf131250b3fb919febfece28",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.1",
+                "php": ">=8.2",
                 "symfony/deprecation-contracts": "^2.5|^3"
             },
             "require-dev": {
-                "symfony/property-access": "^6.4|^7.0",
-                "symfony/serializer": "^6.4|^7.0",
-                "symfony/var-dumper": "^5.4|^6.0|^7.0"
+                "symfony/property-access": "^6.4|^7.0|^8.0",
+                "symfony/serializer": "^6.4|^7.0|^8.0",
+                "symfony/var-dumper": "^6.4|^7.0|^8.0"
             },
             "type": "library",
             "autoload": {
@@ -3033,7 +3018,7 @@
                 "serialize"
             ],
             "support": {
-                "source": "https://github.com/symfony/var-exporter/tree/v6.4.36"
+                "source": "https://github.com/symfony/var-exporter/tree/v7.4.14"
             },
             "funding": [
                 {
@@ -3053,7 +3038,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-03-10T15:06:19+00:00"
+            "time": "2026-06-27T08:41:53+00:00"
         },
         {
             "name": "theseer/tokenizer",
diff --git a/src/JSONObject.php b/src/JSONObject.php
index 8a775b0..c5d4b84 100644
--- a/src/JSONObject.php
+++ b/src/JSONObject.php
@@ -1,7 +1,7 @@
 <?php
 namespace GT\Json;
 
-use Gt\DataObject\DataObject;
+use GT\DataObject\DataObject;
 use GT\Json\JSONPrimitive\JSONPrimitive;
 use Stringable;
 
diff --git a/src/JSONObjectBuilder.php b/src/JSONObjectBuilder.php
index 0f08600..ea551a2 100644
--- a/src/JSONObjectBuilder.php
+++ b/src/JSONObjectBuilder.php
@@ -1,7 +1,7 @@
 <?php
 namespace GT\Json;
 
-use Gt\DataObject\DataObjectBuilder;
+use GT\DataObject\DataObjectBuilder;
 use GT\Json\JSONPrimitive\JSONArrayPrimitive;
 use GT\Json\JSONPrimitive\JSONBoolPrimitive;
 use GT\Json\JSONPrimitive\JSONFloatPrimitive;
diff --git a/src/JsonDecodeException.php b/src/JsonDecodeException.php
deleted file mode 100644
index 6dbccf4..0000000
--- a/src/JsonDecodeException.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONDecodeException.php";
diff --git a/src/JsonErrorCustomPropertyNameException.php b/src/JsonErrorCustomPropertyNameException.php
deleted file mode 100644
index 7a49695..0000000
--- a/src/JsonErrorCustomPropertyNameException.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONErrorCustomPropertyNameException.php";
diff --git a/src/JsonErrorStateException.php b/src/JsonErrorStateException.php
deleted file mode 100644
index b2f5621..0000000
--- a/src/JsonErrorStateException.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONErrorStateException.php";
diff --git a/src/JsonException.php b/src/JsonException.php
deleted file mode 100644
index 7786de9..0000000
--- a/src/JsonException.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONException.php";
diff --git a/src/JsonKvpObject.php b/src/JsonKvpObject.php
deleted file mode 100644
index dbad03e..0000000
--- a/src/JsonKvpObject.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONKvpObject.php";
diff --git a/src/JsonObject.php b/src/JsonObject.php
deleted file mode 100644
index 603704c..0000000
--- a/src/JsonObject.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONObject.php";
diff --git a/src/JsonObjectBuilder.php b/src/JsonObjectBuilder.php
deleted file mode 100644
index 37caf20..0000000
--- a/src/JsonObjectBuilder.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONObjectBuilder.php";
diff --git a/src/JsonPrimitive/JsonArrayPrimitive.php b/src/JsonPrimitive/JsonArrayPrimitive.php
deleted file mode 100644
index 2fe523c..0000000
--- a/src/JsonPrimitive/JsonArrayPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONArrayPrimitive.php";
diff --git a/src/JsonPrimitive/JsonBoolPrimitive.php b/src/JsonPrimitive/JsonBoolPrimitive.php
deleted file mode 100644
index bd59f07..0000000
--- a/src/JsonPrimitive/JsonBoolPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONBoolPrimitive.php";
diff --git a/src/JsonPrimitive/JsonFloatPrimitive.php b/src/JsonPrimitive/JsonFloatPrimitive.php
deleted file mode 100644
index 385e949..0000000
--- a/src/JsonPrimitive/JsonFloatPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONFloatPrimitive.php";
diff --git a/src/JsonPrimitive/JsonIntPrimitive.php b/src/JsonPrimitive/JsonIntPrimitive.php
deleted file mode 100644
index d2dd38c..0000000
--- a/src/JsonPrimitive/JsonIntPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONIntPrimitive.php";
diff --git a/src/JsonPrimitive/JsonNullPrimitive.php b/src/JsonPrimitive/JsonNullPrimitive.php
deleted file mode 100644
index 11938f7..0000000
--- a/src/JsonPrimitive/JsonNullPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONNullPrimitive.php";
diff --git a/src/JsonPrimitive/JsonPrimitive.php b/src/JsonPrimitive/JsonPrimitive.php
deleted file mode 100644
index 4c8bda5..0000000
--- a/src/JsonPrimitive/JsonPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONPrimitive.php";
diff --git a/src/JsonPrimitive/JsonStringPrimitive.php b/src/JsonPrimitive/JsonStringPrimitive.php
deleted file mode 100644
index 8a18454..0000000
--- a/src/JsonPrimitive/JsonStringPrimitive.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once dirname(__DIR__) . "/JSONPrimitive/JSONStringPrimitive.php";
diff --git a/src/JsonTypeException.php b/src/JsonTypeException.php
deleted file mode 100644
index 3e89822..0000000
--- a/src/JsonTypeException.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONTypeException.php";
diff --git a/src/Schema/JsonDocument.php b/src/Schema/JsonDocument.php
deleted file mode 100644
index 61fbbc7..0000000
--- a/src/Schema/JsonDocument.php
+++ /dev/null
@@ -1,4 +0,0 @@
-<?php
-// Legacy PSR-4 shim to preserve the pre-JSON* public API for dependents.
-
-require_once __DIR__ . "/JSONDocument.php";
diff --git a/src/Schema/ValidationError.php b/src/Schema/ValidationError.php
index 6bdf379..ba207b5 100644
--- a/src/Schema/ValidationError.php
+++ b/src/Schema/ValidationError.php
@@ -1,8 +1,7 @@
 <?php
 namespace GT\Json\Schema;
 
-use Gt\DataObject\DataObject;
-use GT\Json\JSONKvpObject;
+use GT\DataObject\DataObject;
 use GT\Json\JSONObject;
 use GT\Json\JSONObjectBuilder;
 use JsonSerializable;
diff --git a/test/phpunit/ClassAliasCompatibilityTest.php b/test/phpunit/ClassAliasCompatibilityTest.php
deleted file mode 100644
index 33d0d34..0000000
--- a/test/phpunit/ClassAliasCompatibilityTest.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-namespace GT\Json\Test;
-
-use PHPUnit\Framework\TestCase;
-
-class ClassAliasCompatibilityTest extends TestCase {
-	public function testLegacyGtClassNamesResolveToNewApi():void {
-		self::assertTrue(class_exists(\GT\Json\JsonObjectBuilder::class));
-		self::assertTrue(class_exists(\GT\Json\Schema\JsonDocument::class));
-		self::assertTrue(class_exists(\GT\Json\JsonPrimitive\JsonStringPrimitive::class));
-
-		$builder = new \GT\Json\JsonObjectBuilder();
-		$json = $builder->fromAssociativeArray(["name" => "Ada"]);
-
-		self::assertInstanceOf(\GT\Json\JSONObjectBuilder::class, $builder);
-		self::assertInstanceOf(\GT\Json\JSONObject::class, $json);
-		self::assertSame("Ada", $json->getString("name"));
-	}
-
-	public function testLegacyGtLowercaseNamespaceAliasesAlsoResolve():void {
-		self::assertTrue(class_exists(\Gt\Json\JsonObjectBuilder::class));
-		self::assertTrue(class_exists(\Gt\Json\Schema\JsonDocument::class));
-
-		$builder = new \Gt\Json\JsonObjectBuilder();
-		$document = new \Gt\Json\Schema\JsonDocument();
-		$document->set("name", "Ada");
-
-		self::assertInstanceOf(\GT\Json\JSONObjectBuilder::class, $builder);
-		self::assertInstanceOf(\GT\Json\Schema\JSONDocument::class, $document);
-		self::assertSame("Ada", $document->get("name"));
-	}
-}