diff --git a/LICENSE.md b/LICENSE.md
index e91703e73..91df97eb2 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 # MIT License
 
-Copyright (c) 2017 GodotNativeTools
+Copyright (c) 2017-2019 GodotNativeTools
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/godot_headers b/godot_headers
index b98ac387a..489db2761 160000
--- a/godot_headers
+++ b/godot_headers
@@ -1 +1 @@
-Subproject commit b98ac387a1407c16536fdde79466f932433adb0b
+Subproject commit 489db2761c8aa0f49efbbc729dfa728f850f9756
diff --git a/src/core/String.cpp b/src/core/String.cpp
index 35353220e..1f4be2ae1 100644
--- a/src/core/String.cpp
+++ b/src/core/String.cpp
@@ -99,7 +99,7 @@ String::~String() {
 }
 
 wchar_t &String::operator[](const int idx) {
-	return *godot::api->godot_string_operator_index(&_godot_string, idx);
+	return *const_cast<wchar_t *>(godot::api->godot_string_operator_index(&_godot_string, idx));
 }
 
 wchar_t String::operator[](const int idx) const {