diff --git a/cmake/tools/SetupWebKit.cmake b/cmake/tools/SetupWebKit.cmake
index 5a701ad821987c..6767ccdabc177c 100644
--- a/cmake/tools/SetupWebKit.cmake
+++ b/cmake/tools/SetupWebKit.cmake
@@ -2,7 +2,7 @@ option(WEBKIT_VERSION "The version of WebKit to use")
 option(WEBKIT_LOCAL "If a local version of WebKit should be used instead of downloading")
 
 if(NOT WEBKIT_VERSION)
-  set(WEBKIT_VERSION 543cca2140eafdba845f6689024abaac0d9924f5)
+  set(WEBKIT_VERSION 9b84f43643eff64ab46daec9b860de262c80f5e2)
 endif()
 
 if(WEBKIT_LOCAL)
diff --git a/src/bun.js/bindings/DoubleFormatter.cpp b/src/bun.js/bindings/DoubleFormatter.cpp
index c1a94d55bfa54d..82266076a267b2 100644
--- a/src/bun.js/bindings/DoubleFormatter.cpp
+++ b/src/bun.js/bindings/DoubleFormatter.cpp
@@ -4,12 +4,14 @@
 #include "JavaScriptCore/JSGlobalObjectFunctions.h"
 #include <cstring>
 
+using namespace WTF;
+
 /// Must be called with a buffer of exactly 124
 /// Find the length by scanning for the 0
 extern "C" size_t WTF__dtoa(char* buf_124_bytes, double number)
 {
     NumberToStringBuffer& buf = *reinterpret_cast<NumberToStringBuffer*>(buf_124_bytes);
-    return WTF::numberToStringAndSize(number, buf);
+    return WTF::numberToStringAndSize(number, buf).size();
 }
 
 /// This is the equivalent of the unary '+' operator on a JS string
diff --git a/src/bun.js/bindings/ProcessIdentifier.h b/src/bun.js/bindings/ProcessIdentifier.h
index 1950d8cf0eb79a..f96e26c5aee2d5 100644
--- a/src/bun.js/bindings/ProcessIdentifier.h
+++ b/src/bun.js/bindings/ProcessIdentifier.h
@@ -30,7 +30,7 @@
 namespace WebCore {
 
 enum class ProcessIdentifierType {};
-using ProcessIdentifier = LegacyNullableObjectIdentifier<ProcessIdentifierType>;
+using ProcessIdentifier = ObjectIdentifier<ProcessIdentifierType>;
 
 namespace Process {
 
diff --git a/src/bun.js/bindings/bindings.zig b/src/bun.js/bindings/bindings.zig
index 4e709b0394ad4c..d13e3256aa45a3 100644
--- a/src/bun.js/bindings/bindings.zig
+++ b/src/bun.js/bindings/bindings.zig
@@ -3734,17 +3734,18 @@ pub const JSValue = enum(JSValueReprInt) {
         StringIterator = 70,
         WrapForValidIterator = 71,
         RegExpStringIterator = 72,
-        JSPromise = 73,
-        Map = 74,
-        Set = 75,
-        WeakMap = 76,
-        WeakSet = 77,
-        WebAssemblyModule = 78,
-        WebAssemblyInstance = 79,
-        WebAssemblyGCObject = 80,
-        StringObject = 81,
-        DerivedStringObject = 82,
-        InternalFieldTuple = 83,
+        AsyncFromSyncIterator = 73,
+        JSPromise = 74,
+        Map = 75,
+        Set = 76,
+        WeakMap = 77,
+        WeakSet = 78,
+        WebAssemblyModule = 79,
+        WebAssemblyInstance = 80,
+        WebAssemblyGCObject = 81,
+        StringObject = 82,
+        DerivedStringObject = 83,
+        InternalFieldTuple = 84,
 
         MaxJS = 0b11111111,
         Event = 0b11101111,