diff --git a/src/lib.rs b/src/lib.rs
index e4a591d..ac45326 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -160,13 +160,13 @@ impl !Typed for () {}
 
 impl<T: Typed> Typed for Option<T> {
     fn type_name() -> String {
-        format!("{}?", <T as Typed>::type_name())
+        format!("({})?", <T as Typed>::type_name())
     }
 }
 
 impl<T: Typed> Typed for Vec<T> {
     fn type_name() -> String {
-        format!("{}[]", <T as Typed>::type_name())
+        format!("({})[]", <T as Typed>::type_name())
     }
 }
 
diff --git a/tests/notification.rs b/tests/notification.rs
index c0f1753..12509ce 100644
--- a/tests/notification.rs
+++ b/tests/notification.rs
@@ -60,7 +60,7 @@ fn action() {
     ---| "broadcast"
     ---@field extras table<string, string>?
     ---@field label string
-    ---@field clear boolean?
+    ---@field clear (boolean)?
     local Action
     "#);
 }
@@ -81,10 +81,10 @@ fn notification() {
     insta::assert_snapshot!(<Notification as Typed>::generate_full().unwrap(), @r"
     ---@class Notification
     ---@field title string
-    ---@field message string?
-    ---@field tags string[]?
-    ---@field priority Priority?
-    ---@field actions Action[]?
+    ---@field message (string)?
+    ---@field tags (string)[]?
+    ---@field priority (Priority)?
+    ---@field actions (Action)[]?
     local Notification
     ");
 }