diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index e2730c4d47..2484426c2a 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -1294,7 +1294,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Event>> Document::create_event(DeprecatedSt
     } else if (interface_lowercase == "keyboardevent") {
         event = UIEvents::KeyboardEvent::create(realm, "");
     } else if (interface_lowercase == "messageevent") {
-        event = HTML::MessageEvent::create(realm, "");
+        event = TRY(HTML::MessageEvent::create(realm, ""));
     } else if (interface_lowercase.is_one_of("mouseevent", "mouseevents")) {
         event = UIEvents::MouseEvent::create(realm, "");
     } else if (interface_lowercase == "storageevent") {
diff --git a/Userland/Libraries/LibWeb/HTML/MessageEvent.cpp b/Userland/Libraries/LibWeb/HTML/MessageEvent.cpp
index 4aaba0bc05..639cad228a 100644
--- a/Userland/Libraries/LibWeb/HTML/MessageEvent.cpp
+++ b/Userland/Libraries/LibWeb/HTML/MessageEvent.cpp
@@ -9,12 +9,12 @@
 
 namespace Web::HTML {
 
-MessageEvent* MessageEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, MessageEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<MessageEvent>> MessageEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, MessageEventInit const& event_init)
 {
-    return realm.heap().allocate<MessageEvent>(realm, realm, event_name, event_init).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<MessageEvent>(realm, realm, event_name, event_init));
 }
 
-MessageEvent* MessageEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, MessageEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<MessageEvent>> MessageEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, MessageEventInit const& event_init)
 {
     return create(realm, event_name, event_init);
 }
diff --git a/Userland/Libraries/LibWeb/HTML/MessageEvent.h b/Userland/Libraries/LibWeb/HTML/MessageEvent.h
index 3a62c071aa..838f25bbb6 100644
--- a/Userland/Libraries/LibWeb/HTML/MessageEvent.h
+++ b/Userland/Libraries/LibWeb/HTML/MessageEvent.h
@@ -21,8 +21,8 @@ class MessageEvent : public DOM::Event {
     WEB_PLATFORM_OBJECT(MessageEvent, DOM::Event);
 
 public:
-    static MessageEvent* create(JS::Realm&, DeprecatedFlyString const& event_name, MessageEventInit const& event_init = {});
-    static MessageEvent* construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, MessageEventInit const& event_init);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<MessageEvent>> create(JS::Realm&, DeprecatedFlyString const& event_name, MessageEventInit const& event_init = {});
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<MessageEvent>> construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, MessageEventInit const& event_init);
 
     MessageEvent(JS::Realm&, DeprecatedFlyString const& event_name, MessageEventInit const& event_init);
     virtual ~MessageEvent() override;
diff --git a/Userland/Libraries/LibWeb/HTML/MessagePort.cpp b/Userland/Libraries/LibWeb/HTML/MessagePort.cpp
index 48d83203fc..25040cfb29 100644
--- a/Userland/Libraries/LibWeb/HTML/MessagePort.cpp
+++ b/Userland/Libraries/LibWeb/HTML/MessagePort.cpp
@@ -99,7 +99,7 @@ void MessagePort::post_message(JS::Value message)
         MessageEventInit event_init {};
         event_init.data = message;
         event_init.origin = "<origin>";
-        target_port->dispatch_event(*MessageEvent::create(target_port->realm(), HTML::EventNames::message, event_init));
+        target_port->dispatch_event(MessageEvent::create(target_port->realm(), HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
     }));
 }
 
diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index df10d27f3a..9b92cf3a92 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -913,7 +913,7 @@ WebIDL::ExceptionOr<void> Window::post_message_impl(JS::Value message, Deprecate
         HTML::MessageEventInit event_init {};
         event_init.data = message;
         event_init.origin = "<origin>";
-        dispatch_event(*HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init));
+        dispatch_event(HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
     });
     return {};
 }
diff --git a/Userland/Libraries/LibWeb/HTML/Worker.cpp b/Userland/Libraries/LibWeb/HTML/Worker.cpp
index a430fd579b..def9f1598e 100644
--- a/Userland/Libraries/LibWeb/HTML/Worker.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Worker.cpp
@@ -166,7 +166,7 @@ void Worker::run_a_worker(AK::URL& url, EnvironmentSettingsObject& outside_setti
                 MessageEventInit event_init {};
                 event_init.data = message;
                 event_init.origin = "<origin>";
-                dispatch_event(*MessageEvent::create(*m_worker_realm, HTML::EventNames::message, event_init));
+                dispatch_event(MessageEvent::create(*m_worker_realm, HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
             }));
 
             return JS::js_undefined();
diff --git a/Userland/Libraries/LibWeb/WebSockets/WebSocket.cpp b/Userland/Libraries/LibWeb/WebSockets/WebSocket.cpp
index e0fa3f6ad9..7551f2c1b7 100644
--- a/Userland/Libraries/LibWeb/WebSockets/WebSocket.cpp
+++ b/Userland/Libraries/LibWeb/WebSockets/WebSocket.cpp
@@ -235,7 +235,7 @@ void WebSocket::on_message(ByteBuffer message, bool is_text)
         HTML::MessageEventInit event_init;
         event_init.data = JS::PrimitiveString::create(vm(), text_message);
         event_init.origin = url();
-        dispatch_event(*HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init));
+        dispatch_event(HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
         return;
     }
 
@@ -247,7 +247,7 @@ void WebSocket::on_message(ByteBuffer message, bool is_text)
         HTML::MessageEventInit event_init;
         event_init.data = JS::ArrayBuffer::create(realm(), message);
         event_init.origin = url();
-        dispatch_event(*HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init));
+        dispatch_event(HTML::MessageEvent::create(realm(), HTML::EventNames::message, event_init).release_value_but_fixme_should_propagate_errors());
         return;
     }