diff --git a/src/LaravelSchemaGeneratorServiceProvider.php b/src/LaravelSchemaGeneratorServiceProvider.php
index 1a69918..a656a8e 100644
--- a/src/LaravelSchemaGeneratorServiceProvider.php
+++ b/src/LaravelSchemaGeneratorServiceProvider.php
@@ -23,7 +23,6 @@
 use RomegaSoftware\LaravelSchemaGenerator\TypeHandlers\TypeHandlerRegistry;
 use RomegaSoftware\LaravelSchemaGenerator\TypeHandlers\UniversalTypeHandler;
 use RomegaSoftware\LaravelSchemaGenerator\Writers\ZodTypeScriptWriter;
-use Spatie\LaravelData\Resolvers\DataMorphClassResolver;
 use Spatie\LaravelData\Resolvers\DataValidationMessagesAndAttributesResolver;
 use Spatie\LaravelData\Resolvers\DataValidationRulesResolver;
 use Spatie\LaravelData\Support\DataConfig;
@@ -83,7 +82,7 @@ protected function registerCoreServices(): void
                     $app->make(DataConfig::class),
                     $app->make(RuleNormalizer::class),
                     $app->make(RuleDenormalizer::class),
-                    $app->make(DataMorphClassResolver::class),
+                    $this->resolveDataMorphClassResolver($app),
                 );
             });
             $this->app->singleton(DataValidationMessagesAndAttributesResolver::class, function ($app) {
@@ -193,6 +192,24 @@ protected function spatieDataAvailable(): bool
         return class_exists(\Spatie\LaravelData\Resolvers\DataValidatorResolver::class);
     }
 
+    /**
+     * Resolve the legacy morph class resolver if the installed Spatie version requires it.
+     */
+    protected function resolveDataMorphClassResolver($app): ?object
+    {
+        if (! InheritingDataValidationRulesResolver::requiresDataMorphClassResolver()) {
+            return null;
+        }
+
+        $resolverClass = 'Spatie\\LaravelData\\Resolvers\\DataMorphClassResolver';
+
+        if (! class_exists($resolverClass)) {
+            return null;
+        }
+
+        return $app->make($resolverClass);
+    }
+
     /**
      * Bootstrap services
      */
diff --git a/src/Resolvers/InheritingDataValidationRulesResolver.php b/src/Resolvers/InheritingDataValidationRulesResolver.php
index 489fd73..1fcb52e 100644
--- a/src/Resolvers/InheritingDataValidationRulesResolver.php
+++ b/src/Resolvers/InheritingDataValidationRulesResolver.php
@@ -3,8 +3,8 @@
 namespace RomegaSoftware\LaravelSchemaGenerator\Resolvers;
 
 use ReflectionClass;
+use ReflectionMethod;
 use RomegaSoftware\LaravelSchemaGenerator\Attributes\InheritValidationFrom;
-use Spatie\LaravelData\Resolvers\DataMorphClassResolver;
 use Spatie\LaravelData\Resolvers\DataValidationRulesResolver as BaseResolver;
 use Spatie\LaravelData\Support\DataConfig;
 use Spatie\LaravelData\Support\Validation\DataRules;
@@ -22,14 +22,23 @@ public function __construct(
         DataConfig $dataConfig,
         RuleNormalizer $ruleAttributesResolver,
         RuleDenormalizer $ruleDenormalizer,
-        DataMorphClassResolver $dataMorphClassResolver,
+        ?object $dataMorphClassResolver = null,
     ) {
-        parent::__construct(
+        $parameters = [
             $dataConfig,
             $ruleAttributesResolver,
             $ruleDenormalizer,
-            $dataMorphClassResolver
-        );
+        ];
+
+        if (self::requiresDataMorphClassResolver()) {
+            if ($dataMorphClassResolver === null) {
+                throw new \RuntimeException('Spatie Laravel Data morph resolver is required but was not provided.');
+            }
+
+            $parameters[] = $dataMorphClassResolver;
+        }
+
+        parent::__construct(...$parameters);
     }
 
     public function execute(
@@ -176,4 +185,16 @@ protected function mergeRuleSet(array $existing, array $incoming): array
 
         return $existing;
     }
+
+    public static function requiresDataMorphClassResolver(): bool
+    {
+        static $requires;
+
+        if ($requires === null) {
+            $constructor = new ReflectionMethod(BaseResolver::class, '__construct');
+            $requires = $constructor->getNumberOfParameters() === 4;
+        }
+
+        return $requires;
+    }
 }
diff --git a/tests/Fixtures/Expected/unified-schemas.ts b/tests/Fixtures/Expected/unified-schemas.ts
index 02f3576..ac087a5 100644
--- a/tests/Fixtures/Expected/unified-schemas.ts
+++ b/tests/Fixtures/Expected/unified-schemas.ts
@@ -10,7 +10,7 @@ export const UnifiedValidationRequestSchema = z.object({
 export type UnifiedValidationRequestSchemaType = z.infer<typeof UnifiedValidationRequestSchema>;
 
 export const UnifiedDataSchema = z.object({
-    account_details: z.object({ name: z.string({ error: 'The account details.name field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.name field is required.' }).min(1, 'The account details.name field is required.').max(120, 'The account details.name field must not be greater than 120 characters.'), email: z.string().max(255, 'The account details.email field must not be greater than 255 characters.').trim().nullable().optional(), timezone: z.string().max(50, 'The account details.timezone field must not be greater than 50 characters.').trim().nullable().optional(), status: z.enum(["pending", "active", "inactive", "deleted"], { message: "The account details.status field is required." }), priority: z.number({ error: 'The account details.priority field must be an integer.' }).refine((val) => val != undefined && val != null, { error: 'The account details.priority field is required.' }).min(1, 'The account details.priority field must be at least 1.').max(10, 'The account details.priority field must not be greater than 10.'), address: z.object({ street: z.string({ error: 'The account details.address.street field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.street field is required.' }).min(1, 'The account details.address.street field is required.').max(120, 'The account details.address.street field must not be greater than 120 characters.'), city: z.string({ error: 'The account details.address.city field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.city field is required.' }).min(1, 'The account details.address.city field is required.').max(80, 'The account details.address.city field must not be greater than 80 characters.'), state: z.string({ error: 'The account details.address.state field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.state field is required.' }).min(1, 'The account details.address.state field is required.').max(2, 'The account details.address.state field must not be greater than 2 characters.'), postal_code: z.string({ error: 'The account details.address.postal code field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.postal code field is required.' }).min(1, 'The account details.address.postal code field is required.').regex(/^[0-9]{5}$/, 'The account details.address.postal code field format is invalid.'), country: z.string({ error: 'The account details.address.country field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.country field is required.' }).min(1, 'The account details.address.country field is required.').length(2, 'The account details.address.country field must be 2 characters.') }), preferences: z.object({ marketing_opt_in: z.preprocess((val) => { if (typeof val === "string") { const normalized = val.toLowerCase(); if (normalized === "true" || normalized === "1" || normalized === "on" || normalized === "yes") { return true; } if (normalized === "false" || normalized === "0" || normalized === "off" || normalized === "no") { return false; } } if (val === 1) { return true; } if (val === 0) { return false; } return val; }, z.boolean().optional()), contacts: z.array(z.object({ label: z.enum(["primary", "backup"], { message: "The account details.preferences.contacts.*.label field is required." }), email: z.email({ error: 'The account details.preferences.contacts.*.email field must be a valid email address.' }).trim().min(1, 'The account details.preferences.contacts.*.email field is required.'), phone: z.string().max(20, 'The account details.preferences.contacts.*.phone field must not be greater than 20 characters.').trim().nullable().optional() })).nullable() }).nullable().optional() }),
+    account_details: z.object({ name: z.string({ error: 'The account details.name field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.name field is required.' }).min(1, 'The account details.name field is required.').max(120, 'The account details.name field must not be greater than 120 characters.'), email: z.string().max(255, 'The account details.email field must not be greater than 255 characters.').trim().nullable().optional(), timezone: z.string().max(50, 'The account details.timezone field must not be greater than 50 characters.').trim().nullable().optional(), status: z.enum(["pending", "active", "inactive", "deleted"], { message: "The account details.status field is required." }), priority: z.number({ error: 'The account details.priority field must be an integer.' }).refine((val) => val != undefined && val != null, { error: 'The account details.priority field is required.' }).min(1, 'The account details.priority field must be at least 1.').max(10, 'The account details.priority field must not be greater than 10.'), address: z.object({ street: z.string({ error: 'The account details.address.street field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.street field is required.' }).min(1, 'The account details.address.street field is required.').max(120, 'The account details.address.street field must not be greater than 120 characters.'), city: z.string({ error: 'The account details.address.city field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.city field is required.' }).min(1, 'The account details.address.city field is required.').max(80, 'The account details.address.city field must not be greater than 80 characters.'), state: z.string({ error: 'The account details.address.state field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.state field is required.' }).min(1, 'The account details.address.state field is required.').max(2, 'The account details.address.state field must not be greater than 2 characters.'), postal_code: z.string({ error: 'The account details.address.postal code field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.postal code field is required.' }).min(1, 'The account details.address.postal code field is required.').regex(/^[0-9]{5}$/, 'The account details.address.postal code field format is invalid.'), country: z.string({ error: 'The account details.address.country field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The account details.address.country field is required.' }).min(1, 'The account details.address.country field is required.').length(2, 'The account details.address.country field must be 2 characters.') }), preferences: z.object({ marketing_opt_in: z.preprocess((val) => { if (typeof val === "string") { const normalized = val.toLowerCase(); if (normalized === "true" || normalized === "1" || normalized === "on" || normalized === "yes") { return true; } if (normalized === "false" || normalized === "0" || normalized === "off" || normalized === "no") { return false; } } if (val === 1) { return true; } if (val === 0) { return false; } return val; }, z.boolean().optional()), contacts: z.array(z.object({ label: z.enum(["primary", "backup"], { message: "The account details.preferences.contacts.*.label field is required." }), email: z.email({ error: 'The account details.preferences.contacts.*.email field must be a valid email address.' }).trim().min(1, 'The account details.preferences.contacts.*.email field is required.'), phone: z.string().max(20, 'The account details.preferences.contacts.*.phone field must not be greater than 20 characters.').trim().nullable().optional() })).nullable().optional() }).nullable().optional() }),
     projects: z.array(z.object({ title: z.string({ error: 'The projects.*.title field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The projects.*.title field is required.' }).min(1, 'The projects.*.title field is required.').max(150, 'The projects.*.title field must not be greater than 150 characters.'), summary: z.string().max(500, 'The projects.*.summary field must not be greater than 500 characters.').trim().nullable().optional(), status_state: z.enum(["pending", "active", "inactive", "deleted"], { message: "The projects.*.status state field is required." }), metrics: z.array(z.object({ key: z.string({ error: 'The projects.*.metrics.*.key field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The projects.*.metrics.*.key field is required.' }).min(1, 'The projects.*.metrics.*.key field is required.'), value: z.number({ error: 'The projects.*.metrics.*.value field is required.' }).refine((val) => val != undefined && val != null, { error: 'The projects.*.metrics.*.value field is required.' }).min(0, 'The projects.*.metrics.*.value field must be at least 0.'), trend: z.enum(["up", "down", "flat"]).nullable().optional() })).min(1, 'The projects.*.metrics field must have at least 1 items.'), schedule: z.object({ starts_at: z.string({ error: 'The projects.*.schedule.*.starts at field is required.' }).trim().refine((val) => val != undefined && val != null && val != '', { error: 'The projects.*.schedule.*.starts at field is required.' }).min(1, 'The projects.*.schedule.*.starts at field is required.').refine((val) => { if (val === undefined || val === null) { return true; } if (typeof val !== "string") { return false; } const timestamp = Date.parse(val); return !Number.isNaN(timestamp); }, { message: 'The projects.*.schedule.*.starts at field must be a valid date.' }), ends_at: z.string().refine((val) => { if (val === undefined || val === null) { return true; } if (typeof val !== "string") { return false; } const timestamp = Date.parse(val); return !Number.isNaN(timestamp); }, { message: 'The projects.*.schedule.*.ends at field must be a valid date.' }).trim().nullable().optional() }).optional() })).min(1, 'The projects field must have at least 1 items.'),
     notes: z.string().max(500, 'The notes field must not be greater than 500 characters.').trim().nullable().optional(),
 });