diff --git a/composer.json b/composer.json
index c701831..33c66fe 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "ext-mbstring": "*",
         "ext-json": "*",
         "justinrainbow/json-schema": "^5.2.10",
-        "nesbot/carbon": "^2.63.0",
+        "nesbot/carbon": "^2.63.0 || ^3.0",
         "jmikola/geojson": "^1.0"
     },
     "require-dev": {
diff --git a/src/Fields/DateField.php b/src/Fields/DateField.php
index 6e1be82..0284c06 100644
--- a/src/Fields/DateField.php
+++ b/src/Fields/DateField.php
@@ -11,6 +11,10 @@ class DateField extends BaseField
 
     protected function validateCastValue($val)
     {
+        if (!is_string($val) && !$val instanceof \DateTimeInterface) {
+            throw $this->getValidationException('must be string or datetime', $val);
+        }
+
         if ('any' === $this->format()) {
             try {
                 $date = new Carbon($val);
diff --git a/src/Fields/DatetimeField.php b/src/Fields/DatetimeField.php
index 5b10bda..60a0f27 100644
--- a/src/Fields/DatetimeField.php
+++ b/src/Fields/DatetimeField.php
@@ -9,6 +9,10 @@ class DatetimeField extends BaseField
 {
     protected function validateCastValue($val)
     {
+        if (!is_string($val) && !$val instanceof \DateTimeInterface) {
+            throw $this->getValidationException('must be string or datetime', $val);
+        }
+
         $val = trim($val);
         switch ($this->format()) {
             case 'default':
diff --git a/src/Fields/TimeField.php b/src/Fields/TimeField.php
index 9a50578..6fc4dbd 100644
--- a/src/Fields/TimeField.php
+++ b/src/Fields/TimeField.php
@@ -13,6 +13,10 @@ class TimeField extends BaseField
 {
     protected function validateCastValue($val)
     {
+        if (!is_string($val) && !$val instanceof \DateTimeInterface) {
+            throw $this->getValidationException('must be string or datetime', $val);
+        }
+
         switch ($this->format()) {
             case 'default':
                 $time = explode(':', $val);
diff --git a/tests/FieldTypesTest.php b/tests/FieldTypesTest.php
index 75399bc..ff34317 100644
--- a/tests/FieldTypesTest.php
+++ b/tests/FieldTypesTest.php
@@ -579,7 +579,14 @@ protected function assertFieldTestData($fieldType, $testData): void
             if (self::ERROR === $expectedCastValue) {
                 $this->assertNotEmpty($field->validateValue($inputValue), $assertMessage);
             } elseif (is_object($expectedCastValue)) {
-                $this->assertEquals($expectedCastValue, $field->castValue($inputValue), $assertMessage);
+                $castValue = $field->castValue($inputValue);
+                if ($expectedCastValue instanceof CarbonInterval && $castValue instanceof CarbonInterval) {
+                    // Carbon 3.x changed internal CarbonInterval properties (e.g. originalInput),
+                    // breaking whole-object comparison. Compare the ISO 8601 spec instead.
+                    $this->assertEquals($expectedCastValue->spec(), $castValue->spec(), $assertMessage);
+                } else {
+                    $this->assertEquals($expectedCastValue, $castValue, $assertMessage);
+                }
             } else {
                 $this->assertSame($expectedCastValue, $field->castValue($inputValue), $assertMessage);
             }