diff --git a/composer.json b/composer.json
index a6f4ea8..6f6f10a 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     },
     "require": {
         "php": "^7.2 || ^8",
-        "monolog/monolog": "^2.0",
+        "monolog/monolog": "^2.0 || ^3.0",
         "aws/aws-sdk-php": "^3.18"
     },
     "require-dev": {
diff --git a/src/Handler/CloudWatch.php b/src/Handler/CloudWatch.php
index 26a1271..85c2196 100755
--- a/src/Handler/CloudWatch.php
+++ b/src/Handler/CloudWatch.php
@@ -161,7 +161,7 @@ public function __construct(
     /**
      * {@inheritdoc}
      */
-    protected function write(array $record): void
+    protected function write(\Monolog\LogRecord $record): void
     {
         $records = $this->formatRecords($record);
 
@@ -280,10 +280,22 @@ protected function willMessageTimestampExceedLimit(array $record): bool
      * @param array $entry
      * @return array
      */
-    private function formatRecords(array $entry): array
+    private function formatRecords(\Monolog\LogRecord $entry): array
     {
-        $entries = str_split($entry['formatted'], self::EVENT_SIZE_LIMIT);
-        $timestamp = $entry['datetime']->format('U.u') * 1000;
+        // Extract the formatted message from the LogRecord
+        $formattedMessage = $entry->formatted;
+
+        // If formattedMessage is not yet defined, format it here (depends on how your formatter works)
+        if (is_null($formattedMessage)) {
+            $formattedMessage = sprintf("[%s] %s: %s", $entry->datetime->format('Y-m-d H:i:s'), $entry->level->name, $entry->message);
+            if (!empty($entry->context)) {
+                $formattedMessage .= ' ' . json_encode($entry->context);
+            }
+        }
+
+        // Split the message into chunks based on EVENT_SIZE_LIMIT
+        $entries = str_split($formattedMessage, self::EVENT_SIZE_LIMIT);
+        $timestamp = $entry->datetime->format('U.u') * 1000;
         $records = [];
 
         foreach ($entries as $entry) {