diff --git a/composer.json b/composer.json
index 665f9d7..93f2e09 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "itsnubix/nowcal",
-  "version": "1.2.3",
+  "version": "1.2.4",
   "description": "A modern PHP library for generating iCalendar v2.0 events",
   "keywords": [
     "icalendar",
diff --git a/src/NowCal/NowCal.php b/src/NowCal/NowCal.php
index 56d51c2..a012156 100644
--- a/src/NowCal/NowCal.php
+++ b/src/NowCal/NowCal.php
@@ -566,7 +566,7 @@ protected function formatOffset(int $offset): string
     protected function createEvent(): void
     {
         $this->output[] = 'BEGIN:VEVENT';
-        $this->output[] = $this->getUidAttribute();
+        $this->output[] = 'UID:' . $this->getUidAttribute();
 
         foreach ($this->event_parameters as $key) {
             $this->output[] = $this->getParameter($key);