diff --git a/Userland/Libraries/LibWeb/HTML/EventNames.h b/Userland/Libraries/LibWeb/HTML/EventNames.h
index 02990c5279..9f8c2f0cd8 100644
--- a/Userland/Libraries/LibWeb/HTML/EventNames.h
+++ b/Userland/Libraries/LibWeb/HTML/EventNames.h
@@ -24,6 +24,7 @@ namespace Web::HTML::EventNames {
     __ENUMERATE_HTML_EVENT(afterprint)               \
     __ENUMERATE_HTML_EVENT(beforeprint)              \
     __ENUMERATE_HTML_EVENT(beforeunload)             \
+    __ENUMERATE_HTML_EVENT(blocked)                  \
     __ENUMERATE_HTML_EVENT(blur)                     \
     __ENUMERATE_HTML_EVENT(cancel)                   \
     __ENUMERATE_HTML_EVENT(canplay)                  \
diff --git a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.cpp b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.cpp
index ecb4f9a0ea..827bd70648 100644
--- a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.cpp
+++ b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.cpp
@@ -1,11 +1,13 @@
 /*
  * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #include <LibWeb/Bindings/IDBOpenDBRequestPrototype.h>
 #include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/HTML/EventNames.h>
 #include <LibWeb/IndexedDB/IDBOpenDBRequest.h>
 
 namespace Web::IndexedDB {
@@ -25,4 +27,16 @@ void IDBOpenDBRequest::initialize(JS::Realm& realm)
     WEB_SET_PROTOTYPE_FOR_INTERFACE(IDBOpenDBRequest);
 }
 
+// https://w3c.github.io/IndexedDB/#dom-idbopendbrequest-onblocked
+void IDBOpenDBRequest::set_onblocked(WebIDL::CallbackType* event_handler)
+{
+    set_event_handler_attribute(HTML::EventNames::blocked, event_handler);
+}
+
+// https://w3c.github.io/IndexedDB/#dom-idbopendbrequest-onblocked
+WebIDL::CallbackType* IDBOpenDBRequest::onblocked()
+{
+    return event_handler_attribute(HTML::EventNames::blocked);
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.h b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.h
index 5fa6903f42..6055ff5d15 100644
--- a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.h
+++ b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -18,6 +19,9 @@ class IDBOpenDBRequest : public IDBRequest {
 public:
     virtual ~IDBOpenDBRequest();
 
+    void set_onblocked(WebIDL::CallbackType*);
+    WebIDL::CallbackType* onblocked();
+
 protected:
     explicit IDBOpenDBRequest(JS::Realm&);
 
diff --git a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.idl b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.idl
index dd1f05cb4f..51c7787cfb 100644
--- a/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.idl
+++ b/Userland/Libraries/LibWeb/IndexedDB/IDBOpenDBRequest.idl
@@ -4,6 +4,6 @@
 [Exposed=(Window,Worker)]
 interface IDBOpenDBRequest : IDBRequest {
     // Event handlers:
-    [FIXME] attribute EventHandler onblocked;
+    attribute EventHandler onblocked;
     [FIXME] attribute EventHandler onupgradeneeded;
 };