diff --git a/Admin/Uninstaller.php b/Admin/Uninstaller.php
index ee01217..ac2e8fb 100644
--- a/Admin/Uninstaller.php
+++ b/Admin/Uninstaller.php
@@ -33,7 +33,7 @@ class Uninstaller extends UninstallerAbstract
     /**
      * {@inheritdoc}
      */
-    public static function uninstall(DatabasePool $dbPool, InfoManager $info)
+    public static function uninstall(DatabasePool $dbPool, InfoManager $info) : void
     {
         parent::uninstall($dbPool, $info);
 
diff --git a/Models/Calendar.php b/Models/Calendar.php
index cb6e9a0..28ba4da 100644
--- a/Models/Calendar.php
+++ b/Models/Calendar.php
@@ -129,9 +129,11 @@ class Calendar
     /**
      * @param string $desc Calendar description
      *
+     * @return void
+     * 
      * @since  1.0.0
      */
-    public function setDescription(string $desc)
+    public function setDescription(string $desc) : void
     {
         $this->description = $desc;
     }