diff --git a/connection-type.php b/connection-type.php
index 1deb846..c736485 100644
--- a/connection-type.php
+++ b/connection-type.php
@@ -1,6 +1,6 @@
 <?php
 
-class P2P_Connection_Type {
+#[AllowDynamicProperties] class P2P_Connection_Type {
 
 	public $side;
 
diff --git a/side-post.php b/side-post.php
index 4b26d1f..4a31879 100644
--- a/side-post.php
+++ b/side-post.php
@@ -1,6 +1,6 @@
 <?php
 
-class P2P_Side_Post extends P2P_Side {
+#[AllowDynamicProperties] class P2P_Side_Post extends P2P_Side {
 
 	protected $item_type = 'P2P_Item_Post';