diff --git a/api/subscriptions/get_ical_feed.php b/api/subscriptions/get_ical_feed.php
index b454e4a..5e4c88f 100644
--- a/api/subscriptions/get_ical_feed.php
+++ b/api/subscriptions/get_ical_feed.php
@@ -172,7 +172,7 @@ if ($_SERVER["REQUEST_METHOD"] === "POST" || $_SERVER["REQUEST_METHOD"] === "GET
         $subscription['trigger'] = ($subscription['notify_days_before'] == -1) ? $globalNotificationDays : ($subscription['notify_days_before'] ?: 1);
         $subscription['price'] = number_format($subscription['price'], 2);
 
-        $uid = uniqid();
+        $uid = 'wallos-subscription-' . $subscription['id'] . '@wallos';
         $summary = html_entity_decode($subscription['name'], ENT_QUOTES, 'UTF-8');
         $description = "Price: {$subscription['currency']}{$subscription['price']}\\nCategory: {$subscription['category']}\\nPayment Method: {$subscription['payment_method']}\\nPayer: {$subscription['payer_user']}\\nNotes: {$subscription['notes']}";
         $dtstamp = gmdate('Ymd\THis\Z');
diff --git a/endpoints/subscription/exportcalendar.php b/endpoints/subscription/exportcalendar.php
index bc7df00..b680dca 100644
--- a/endpoints/subscription/exportcalendar.php
+++ b/endpoints/subscription/exportcalendar.php
@@ -31,7 +31,7 @@ if ($subscription) {
     $subscription['price'] = number_format($subscription['price'], 2);
 
     // Create ICS from subscription information
-    $uid = uniqid();
+    $uid = 'wallos-subscription-' . $subscription['id'] . '@wallos';
     $summary = html_entity_decode($subscription['name'], ENT_QUOTES, 'UTF-8');
     $description = "Price: {$subscription['currency']}{$subscription['price']}\nCategory: {$subscription['category']}\nPayment Method: {$subscription['payment_method']}\nPayer: {$subscription['payer_user']}\n\nNotes: {$subscription['notes']}";