diff --git a/src/Generators/Ics.php b/src/Generators/Ics.php
index 5e0fd7d..887f0dc 100644
--- a/src/Generators/Ics.php
+++ b/src/Generators/Ics.php
@@ -14,9 +14,12 @@ class Ics implements Generator
     protected $dateFormat = 'Ymd';
     protected $dateTimeFormat = 'e:Ymd\THis';
 
-    /** @var array */
+    /** @var array<non-empty-string, non-empty-string> */
     protected $options = [];
 
+    /**
+     * @param array<non-empty-string, non-empty-string> $options
+     */
     public function __construct(array $options = [])
     {
         $this->options = $options;
diff --git a/src/Link.php b/src/Link.php
index d2147e6..56ab3c3 100644
--- a/src/Link.php
+++ b/src/Link.php
@@ -114,6 +114,10 @@ public function google(): string
         return $this->formatWith(new Google());
     }
 
+    /**
+     * @param array<non-empty-string, non-empty-string> $options
+     * @return string
+     */
     public function ics(array $options = []): string
     {
         return $this->formatWith(new Ics($options));