diff --git a/src/SDK.php b/src/SDK.php
index a2fbdb38..88bd350c 100644
--- a/src/SDK.php
+++ b/src/SDK.php
@@ -77,6 +77,10 @@ public function platform()
     public function createSubscription(string $type = 'WebSocket')
     {
         if ($type == 'Pubnub') {
+            trigger_error(
+                'PubNub support is deprecated. Please migrate your application to WebSockets.',
+                E_USER_DEPRECATED
+            );
             return new PubnubSubscription($this->_platform);
         }
         if (empty($this->websocket())) {