diff --git a/ReactCommon/jschelpers/JSCWrapper.h b/ReactCommon/jschelpers/JSCWrapper.h
index 97fb661f7..aa4053784 100644
--- a/ReactCommon/jschelpers/JSCWrapper.h
+++ b/ReactCommon/jschelpers/JSCWrapper.h
@@ -101,6 +101,7 @@ struct JSCWrapper {
   JSC_WRAPPER_METHOD(JSObjectMakeFunctionWithCallback);
   JSC_WRAPPER_METHOD(JSObjectSetPrivate);
   JSC_WRAPPER_METHOD(JSObjectSetProperty);
+  JSC_WRAPPER_METHOD(JSObjectSetPropertyAtIndex);
 
   // JSPropertyNameArray
   JSC_WRAPPER_METHOD(JSObjectCopyPropertyNames);
diff --git a/ReactCommon/jschelpers/JavaScriptCore.h b/ReactCommon/jschelpers/JavaScriptCore.h
index f0e4423ff..737cf828c 100644
--- a/ReactCommon/jschelpers/JavaScriptCore.h
+++ b/ReactCommon/jschelpers/JavaScriptCore.h
@@ -146,6 +146,7 @@ jsc_poison(JSClassCreate JSClassRelease JSClassRetain)
 #define JSC_JSObjectMakeFunctionWithCallback(...) __jsc_wrapper(JSObjectMakeFunctionWithCallback, __VA_ARGS__)
 #define JSC_JSObjectSetPrivate(...) __jsc_bool_wrapper(JSObjectSetPrivate, __VA_ARGS__)
 #define JSC_JSObjectSetProperty(...) __jsc_wrapper(JSObjectSetProperty, __VA_ARGS__)
+#define JSC_JSObjectSetPropertyAtIndex(...) __jsc_wrapper(JSObjectSetPropertyAtIndex, __VA_ARGS__)
 
 jsc_poison(JSObjectCallAsConstructor JSObjectCallAsFunction JSObjectDeleteProperty
            JSObjectGetPrivate JSObjectGetProperty JSObjectGetPropertyAtIndex
diff --git a/ReactCommon/jschelpers/Value.cpp b/ReactCommon/jschelpers/Value.cpp
index b228da367..7f00ea973 100644
--- a/ReactCommon/jschelpers/Value.cpp
+++ b/ReactCommon/jschelpers/Value.cpp
@@ -59,7 +59,7 @@ Value Value::fromJSON(JSContextRef ctx, const String& json) {
   return Value(ctx, result);
 }
 
-JSValueRef Value::fromDynamic(JSContextRef ctx, const folly::dynamic& value) {
+Value Value::fromDynamic(JSContextRef ctx, const folly::dynamic& value) {
 // JavaScriptCore's iOS APIs have their own version of this direct conversion.
 // In addition, using this requires exposing some of JSC's private APIs,
 //  so it's limited to non-apple platforms and to builds that use the custom JSC.
@@ -75,7 +75,7 @@ JSValueRef Value::fromDynamic(JSContextRef ctx, const folly::dynamic& value) {
   JSValueRef jsVal = Value::fromDynamicInner(ctx, value);
   JSUnlock(ctx);
   JSResumeGarbageCollection(ctx, deferGC);
-  return jsVal;
+  return Value(ctx, jsVal);
 #else
   auto json = folly::toJson(value);
   return fromJSON(ctx, String(ctx, json.c_str()));
@@ -140,9 +140,7 @@ Object Value::asObject() {
     std::string exceptionText = Value(m_context, exn).toString().str();
     throwJSExecutionException("Failed to convert to object: %s", exceptionText.c_str());
   }
-  Object ret = Object(context(), jsObj);
-  m_value = nullptr;
-  return ret;
+  return Object(context(), jsObj);
 }
 
 Value Value::makeError(JSContextRef ctx, const char *error)
@@ -207,7 +205,7 @@ Value Object::getProperty(const String& propName) const {
   return Value(m_context, property);
 }
 
-Value Object::getPropertyAtIndex(unsigned index) const {
+Value Object::getPropertyAtIndex(unsigned int index) const {
   JSValueRef exn;
   JSValueRef property = JSC_JSObjectGetPropertyAtIndex(m_context, m_obj, index, &exn);
   if (!property) {
@@ -221,8 +219,8 @@ Value Object::getProperty(const char *propName) const {
   return getProperty(String(m_context, propName));
 }
 
-void Object::setProperty(const String& propName, const Value& value) const {
-  JSValueRef exn = NULL;
+void Object::setProperty(const String& propName, const Value& value) {
+  JSValueRef exn = nullptr;
   JSC_JSObjectSetProperty(m_context, m_obj, propName, value, kJSPropertyAttributeNone, &exn);
   if (exn) {
     std::string exceptionText = Value(m_context, exn).toString().str();
@@ -230,7 +228,16 @@ void Object::setProperty(const String& propName, const Value& value) const {
   }
 }
 
-void Object::setProperty(const char *propName, const Value& value) const {
+void Object::setPropertyAtIndex(unsigned int index, const Value& value) {
+  JSValueRef exn = nullptr;
+  JSC_JSObjectSetPropertyAtIndex(m_context, m_obj, index, value, &exn);
+  if (exn) {
+    std::string exceptionText = Value(m_context, exn).toString().str();
+    throwJSExecutionException("Failed to set property: %s", exceptionText.c_str());
+  }
+}
+
+void Object::setProperty(const char *propName, const Value& value) {
   setProperty(String(m_context, propName), value);
 }
 
diff --git a/ReactCommon/jschelpers/Value.h b/ReactCommon/jschelpers/Value.h
index ad9e81e04..d90cedee3 100644
--- a/ReactCommon/jschelpers/Value.h
+++ b/ReactCommon/jschelpers/Value.h
@@ -201,9 +201,10 @@ public:
 
   Value getProperty(const String& propName) const;
   Value getProperty(const char *propName) const;
-  Value getPropertyAtIndex(unsigned index) const;
-  void setProperty(const String& propName, const Value& value) const;
-  void setProperty(const char *propName, const Value& value) const;
+  Value getPropertyAtIndex(unsigned int index) const;
+  void setProperty(const String& propName, const Value& value);
+  void setProperty(const char *propName, const Value& value);
+  void setPropertyAtIndex(unsigned int index, const Value& value);
   std::vector<String> getPropertyNames() const;
   std::unordered_map<std::string, std::string> toJSONMap() const;
 
@@ -334,7 +335,7 @@ public:
 
   __attribute__((visibility("default"))) std::string toJSONString(unsigned indent = 0) const;
   __attribute__((visibility("default"))) static Value fromJSON(JSContextRef ctx, const String& json);
-  __attribute__((visibility("default"))) static JSValueRef fromDynamic(JSContextRef ctx, const folly::dynamic& value);
+  __attribute__((visibility("default"))) static Value fromDynamic(JSContextRef ctx, const folly::dynamic& value);
   __attribute__((visibility("default"))) JSContextRef context() const;
 protected:
   JSContextRef m_context;
diff --git a/ReactCommon/jschelpers/systemJSCWrapper.cpp b/ReactCommon/jschelpers/systemJSCWrapper.cpp
index a36124838..142726bcd 100644
--- a/ReactCommon/jschelpers/systemJSCWrapper.cpp
+++ b/ReactCommon/jschelpers/systemJSCWrapper.cpp
@@ -93,6 +93,7 @@ const JSCWrapper* systemJSCWrapper() {
       .JSObjectMakeFunctionWithCallback = JSObjectMakeFunctionWithCallback,
       .JSObjectSetPrivate = JSObjectSetPrivate,
       .JSObjectSetProperty = JSObjectSetProperty,
+      .JSObjectSetPropertyAtIndex = JSObjectSetPropertyAtIndex,
 
       .JSObjectCopyPropertyNames = JSObjectCopyPropertyNames,
       .JSPropertyNameArrayGetCount = JSPropertyNameArrayGetCount,