diff --git a/includes/activity/class-activity-object.php b/includes/activity/class-activity-object.php
index 0115a40..a71a83e 100644
--- a/includes/activity/class-activity-object.php
+++ b/includes/activity/class-activity-object.php
@@ -524,7 +524,10 @@ class Activity_Object {
 			$this->$key = array();
 		}
 
-		$this->$key[] = $value;
+		$attributes   = $this->$key;
+		$attributes[] = $value;
+
+		$this->$key = $attributes;
 
 		return $this->$key;
 	}
diff --git a/includes/collection/class-followers.php b/includes/collection/class-followers.php
index 96b9099..39bfc2b 100644
--- a/includes/collection/class-followers.php
+++ b/includes/collection/class-followers.php
@@ -76,9 +76,7 @@ class Followers {
 			self::POST_TYPE,
 			'icon',
 			array(
-				//'type'              => 'string',
 				'single'            => true,
-				//'sanitize_callback' => array( self::class, 'sanitize_url' ),
 			)
 		);