diff --git a/Userland/Libraries/LibWeb/HTML/Worker.idl b/Userland/Libraries/LibWeb/HTML/Worker.idl
index b439406b6e7..1980c0ce0d2 100644
--- a/Userland/Libraries/LibWeb/HTML/Worker.idl
+++ b/Userland/Libraries/LibWeb/HTML/Worker.idl
@@ -2,6 +2,7 @@
 #import <DOM/EventHandler.idl>
 #import <HTML/AbstractWorker.idl>
 #import <HTML/MessagePort.idl>
+#import <Fetch/Request.idl>
 
 // https://html.spec.whatwg.org/#worker
 [Exposed=(Window,DedicatedWorker,SharedWorker)]
@@ -18,9 +19,11 @@ interface Worker : EventTarget {
 };
 
 dictionary WorkerOptions {
-    USVString type = "classic";
-    USVString credentials = "same-origin";
+    WorkerType type = "classic";
+    RequestCredentials credentials = "same-origin";
     DOMString name = "";
 };
 
+enum WorkerType { "classic", "module" };
+
 Worker includes AbstractWorker;
diff --git a/Userland/Libraries/LibWeb/HTML/WorkerAgent.h b/Userland/Libraries/LibWeb/HTML/WorkerAgent.h
index 24acd7a2a56..d0f4bd8b68e 100644
--- a/Userland/Libraries/LibWeb/HTML/WorkerAgent.h
+++ b/Userland/Libraries/LibWeb/HTML/WorkerAgent.h
@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include <LibWeb/Bindings/RequestPrototype.h>
+#include <LibWeb/Bindings/WorkerPrototype.h>
 #include <LibWeb/Forward.h>
 #include <LibWeb/HTML/MessagePort.h>
 #include <LibWeb/Worker/WebWorkerClient.h>
@@ -13,8 +15,8 @@
 namespace Web::HTML {
 
 struct WorkerOptions {
-    String type { "classic"_string };
-    String credentials { "same-origin"_string };
+    Bindings::WorkerType type { Bindings::WorkerType::Classic };
+    Bindings::RequestCredentials credentials { Bindings::RequestCredentials::SameOrigin };
     String name { String {} };
 };
 
diff --git a/Userland/Libraries/LibWeb/Worker/WebWorkerServer.ipc b/Userland/Libraries/LibWeb/Worker/WebWorkerServer.ipc
index 0c218111547..240e469ab69 100644
--- a/Userland/Libraries/LibWeb/Worker/WebWorkerServer.ipc
+++ b/Userland/Libraries/LibWeb/Worker/WebWorkerServer.ipc
@@ -2,10 +2,11 @@
 #include <LibIPC/File.h>
 #include <LibWeb/HTML/StructuredSerialize.h>
 #include <LibWeb/HTML/Scripting/SerializedEnvironmentSettingsObject.h>
+#include <LibWeb/Bindings/WorkerPrototype.h>
 
 endpoint WebWorkerServer {
 
-    start_dedicated_worker(URL::URL url, String type, String credentials, String name, Web::HTML::TransferDataHolder message_port, Web::HTML::SerializedEnvironmentSettingsObject outside_settings) =|
+    start_dedicated_worker(URL::URL url, Web::Bindings::WorkerType type, Web::Bindings::RequestCredentials credentials, String name, Web::HTML::TransferDataHolder message_port, Web::HTML::SerializedEnvironmentSettingsObject outside_settings) =|
 
     close_worker() =|
 
diff --git a/Userland/Services/WebWorker/ConnectionFromClient.cpp b/Userland/Services/WebWorker/ConnectionFromClient.cpp
index 7cf23268651..3ecaceb4f49 100644
--- a/Userland/Services/WebWorker/ConnectionFromClient.cpp
+++ b/Userland/Services/WebWorker/ConnectionFromClient.cpp
@@ -63,7 +63,7 @@ Web::Page const& ConnectionFromClient::page() const
     return m_page_host->page();
 }
 
-void ConnectionFromClient::start_dedicated_worker(URL::URL const& url, String const& type, String const&, String const& name, Web::HTML::TransferDataHolder const& implicit_port, Web::HTML::SerializedEnvironmentSettingsObject const& outside_settings)
+void ConnectionFromClient::start_dedicated_worker(URL::URL const& url, Web::Bindings::WorkerType const& type, Web::Bindings::RequestCredentials const&, String const& name, Web::HTML::TransferDataHolder const& implicit_port, Web::HTML::SerializedEnvironmentSettingsObject const& outside_settings)
 {
     m_worker_host = make_ref_counted<DedicatedWorkerHost>(url, type, name);
     // FIXME: Yikes, const_cast to move? Feels like a LibIPC bug.
diff --git a/Userland/Services/WebWorker/ConnectionFromClient.h b/Userland/Services/WebWorker/ConnectionFromClient.h
index b6d86c3edfe..3fa2f64aaf9 100644
--- a/Userland/Services/WebWorker/ConnectionFromClient.h
+++ b/Userland/Services/WebWorker/ConnectionFromClient.h
@@ -41,7 +41,7 @@ private:
     Web::Page& page();
     Web::Page const& page() const;
 
-    virtual void start_dedicated_worker(URL::URL const& url, String const& type, String const&, String const& name, Web::HTML::TransferDataHolder const&, Web::HTML::SerializedEnvironmentSettingsObject const&) override;
+    virtual void start_dedicated_worker(URL::URL const& url, Web::Bindings::WorkerType const& type, Web::Bindings::RequestCredentials const& credentials, String const& name, Web::HTML::TransferDataHolder const&, Web::HTML::SerializedEnvironmentSettingsObject const&) override;
     virtual void handle_file_return(i32 error, Optional<IPC::File> const& file, i32 request_id) override;
 
     JS::Handle<PageHost> m_page_host;
diff --git a/Userland/Services/WebWorker/DedicatedWorkerHost.cpp b/Userland/Services/WebWorker/DedicatedWorkerHost.cpp
index 13fcaf22329..262b935c97a 100644
--- a/Userland/Services/WebWorker/DedicatedWorkerHost.cpp
+++ b/Userland/Services/WebWorker/DedicatedWorkerHost.cpp
@@ -21,9 +21,9 @@
 
 namespace WebWorker {
 
-DedicatedWorkerHost::DedicatedWorkerHost(URL::URL url, String type, String name)
+DedicatedWorkerHost::DedicatedWorkerHost(URL::URL url, Web::Bindings::WorkerType type, String name)
     : m_url(move(url))
-    , m_type(move(type))
+    , m_type(type)
     , m_name(move(name))
 {
 }
@@ -219,14 +219,14 @@ void DedicatedWorkerHost::run(JS::NonnullGCPtr<Web::Page> page, Web::HTML::Trans
     //               and with onComplete and performFetch as defined below.
     // module:   Fetch a module worker script graph given url, outside settings, destination, the value of the credentials member of options, inside settings,
     //               and with onComplete and performFetch as defined below.
-    if (m_type == "classic"sv) {
+    if (m_type == Web::Bindings::WorkerType::Classic) {
         if (auto err = Web::HTML::fetch_classic_worker_script(m_url, outside_settings, destination, inner_settings, perform_fetch, on_complete); err.is_error()) {
             dbgln("Failed to run worker script");
             // FIXME: Abort the worker properly
             TODO();
         }
     } else {
-        VERIFY(m_type == "module"sv);
+        VERIFY(m_type == Web::Bindings::WorkerType::Module);
         // FIXME: Pass credentials
         if (auto err = Web::HTML::fetch_module_worker_script_graph(m_url, outside_settings, destination, inner_settings, perform_fetch, on_complete); err.is_error()) {
             dbgln("Failed to run worker script");
diff --git a/Userland/Services/WebWorker/DedicatedWorkerHost.h b/Userland/Services/WebWorker/DedicatedWorkerHost.h
index 9fe1f05ce93..7712ec157d4 100644
--- a/Userland/Services/WebWorker/DedicatedWorkerHost.h
+++ b/Userland/Services/WebWorker/DedicatedWorkerHost.h
@@ -9,6 +9,7 @@
 #include <AK/RefCounted.h>
 #include <LibURL/URL.h>
 #include <LibWeb/Bindings/MainThreadVM.h>
+#include <LibWeb/Bindings/WorkerPrototype.h>
 #include <LibWeb/Forward.h>
 #include <LibWeb/HTML/Scripting/SerializedEnvironmentSettingsObject.h>
 #include <LibWeb/HTML/StructuredSerialize.h>
@@ -17,7 +18,7 @@ namespace WebWorker {
 
 class DedicatedWorkerHost : public RefCounted<DedicatedWorkerHost> {
 public:
-    explicit DedicatedWorkerHost(URL::URL url, String type, String name);
+    explicit DedicatedWorkerHost(URL::URL url, Web::Bindings::WorkerType type, String name);
     ~DedicatedWorkerHost();
 
     void run(JS::NonnullGCPtr<Web::Page>, Web::HTML::TransferDataHolder message_port_data, Web::HTML::SerializedEnvironmentSettingsObject const&);
@@ -26,7 +27,7 @@ private:
     JS::Handle<Web::HTML::WorkerDebugConsoleClient> m_console;
 
     URL::URL m_url;
-    String m_type;
+    Web::Bindings::WorkerType m_type;
     String m_name;
 };