diff --git a/src/inferno/application.cpp b/src/inferno/application.cpp
index 3caa73f..c9beb2f 100644
--- a/src/inferno/application.cpp
+++ b/src/inferno/application.cpp
@@ -7,14 +7,14 @@
 #include "inferno/event/event.h"
 #include "inferno/event/keyevent.h"
 #include "inferno/event/mouseevent.h"
-#include "inferno/io/gltffile.h"
+// #include "inferno/io/gltffile.h"
 #include "inferno/io/input.h"
 #include "inferno/io/log.h"
 #include "inferno/keycodes.h"
 #include "inferno/render/buffer.h"
 #include "inferno/render/context.h"
 #include "inferno/render/font.h"
-#include "inferno/render/gltf.h"
+// #include "inferno/render/gltf.h"
 #include "inferno/render/renderer.h"
 #include "inferno/render/shader.h"
 #include "inferno/render/texture.h"
@@ -22,7 +22,6 @@
 #include "inferno/settings.h"
 #include "inferno/time.h"
 #include "inferno/window.h"
-#include <string>
 
 namespace Inferno {
 
@@ -65,7 +64,7 @@ namespace Inferno {
 		// Gltf model = Gltf("assets/gltf/animatedmorphcube.glb");
 		// Gltf model = Gltf("assets/gltf/reciprocatingsaw.glb");
 
-		Gltf model = Gltf("assets/gltf/triangle-without-indices.gltf");
+		// Gltf model = Gltf("assets/gltf/triangle-without-indices.gltf");
 	}
 
 	Application::~Application()
diff --git a/src/inferno/render/gltf.cpp b/src/inferno/render/gltf.cpp
index 8608f4c..c74b985 100644
--- a/src/inferno/render/gltf.cpp
+++ b/src/inferno/render/gltf.cpp
@@ -1,3 +1,4 @@
+#if 0
 #include <algorithm> // std::copy
 #include <utility>   // std::move
 
@@ -337,3 +338,4 @@ namespace Inferno {
 	}
 
 } // namespace Inferno
+#endif
diff --git a/src/inferno/render/gltf.h b/src/inferno/render/gltf.h
index 32fcceb..fa622ba 100644
--- a/src/inferno/render/gltf.h
+++ b/src/inferno/render/gltf.h
@@ -1,6 +1,7 @@
 #ifndef GLTF_H
 #define GLTF_H
 
+#if 0
 #include <cstdint>       // uint32_t
 #include <memory>        // std::shared_ptr
 #include <string>        // std::string
@@ -166,6 +167,6 @@ namespace Inferno {
 	};
 
 } // namespace Inferno
-
+#endif
 
 #endif // GLTF_H
diff --git a/src/inferno/settings.cpp b/src/inferno/settings.cpp
index 63fc22a..b4e60c5 100644
--- a/src/inferno/settings.cpp
+++ b/src/inferno/settings.cpp
@@ -1,10 +1,11 @@
 #include <cstdint> // uint32_t
 #include <string>  // std::string
 
+#include "ruc/json/json.h"
+
 #include "inferno/io/file.h"
 #include "inferno/io/log.h"
 #include "inferno/settings.h"
-#include "inferno/util/json.h"
 #include "inferno/window.h"
 
 namespace Inferno {
@@ -27,24 +28,22 @@ namespace Inferno {
 
 	bool Settings::load()
 	{
-		json object;
+		ruc::Json object;
 
 		if (!File::ioRead(&object, m_path)) {
 			warn() << "Settings invalid formatting, using default values";
 			return false;
 		}
 
-		auto settings = Json::getPropertyValue<SettingsProperties>(object, json::value_t::object);
-		if (settings) {
-			m_properties = settings.value();
-		}
+		m_properties = object.get<SettingsProperties>();
 
 		return true;
 	}
 
 	bool Settings::save()
 	{
-		json object = m_properties;
+		ruc::Json object = m_properties;
+
 		if (!File::ioWrite(&object, m_path)) {
 			warn() << "Settings could not be saved";
 			return false;
@@ -54,23 +53,26 @@ namespace Inferno {
 		return true;
 	}
 
-// -----------------------------------------
+	// -------------------------------------
 
-	void to_json(json& object, const SettingsProperties& settings)
+	void toJson(ruc::Json& object, const SettingsProperties& settings)
 	{
-		object = json {
+		object = ruc::Json {
 			{ "window", settings.window }
 		};
 	}
 
-	void from_json(const json& object, SettingsProperties& settings)
+	void fromJson(const ruc::Json& object, SettingsProperties& settings)
 	{
-		if (Json::hasProperty(object, "window")) object.at("window").get_to(settings.window);
+		VERIFY(object.type() == ruc::Json::Type::Object);
+
+		if (object.exists("window"))
+			object.at("window").getTo(settings.window);
 	}
 
-	void to_json(json& object, const WindowProperties& window)
+	void toJson(ruc::Json& object, const WindowProperties& window)
 	{
-		object = json {
+		object = ruc::Json {
 			{ "title", window.title },
 			{ "width", window.width },
 			{ "height", window.height },
@@ -79,13 +81,20 @@ namespace Inferno {
 		};
 	}
 
-	void from_json(const json& object, WindowProperties& window)
+	void fromJson(const ruc::Json& object, WindowProperties& window)
 	{
-		if (Json::hasProperty(object, "title"))      object.at("title").get_to(window.title);
-		if (Json::hasProperty(object, "width"))      object.at("width").get_to(window.width);
-		if (Json::hasProperty(object, "height"))     object.at("height").get_to(window.height);
-		if (Json::hasProperty(object, "fullscreen")) object.at("fullscreen").get_to(window.fullscreen);
-		if (Json::hasProperty(object, "vsync"))      object.at("vsync").get_to(window.vsync);
+		VERIFY(object.type() == ruc::Json::Type::Object);
+
+		if (object.exists("title"))
+			object.at("title").getTo(window.title);
+		if (object.exists("width"))
+			object.at("width").getTo(window.width);
+		if (object.exists("height"))
+			object.at("height").getTo(window.height);
+		if (object.exists("fullscreen"))
+			object.at("fullscreen").getTo(window.fullscreen);
+		if (object.exists("vsync"))
+			object.at("vsync").getTo(window.vsync);
 	}
 
-}
+} // namespace Inferno
diff --git a/src/inferno/settings.h b/src/inferno/settings.h
index d5e3c42..61cc21e 100644
--- a/src/inferno/settings.h
+++ b/src/inferno/settings.h
@@ -1,7 +1,8 @@
 #ifndef SETTINGS_H
 #define SETTINGS_H
 
-#include "inferno/util/json.h"
+#include "ruc/json/json.h"
+
 #include "inferno/window.h"
 
 namespace Inferno {
@@ -27,14 +28,14 @@ namespace Inferno {
 
 // -----------------------------------------
 
-	// nlohmann::json arbitrary type conversion functions
+	// Json arbitrary type conversion functions
 
-	void to_json(json& object, const SettingsProperties& settings);
-	void from_json(const json& object, SettingsProperties& settings);
+	void toJson(ruc::Json& object, const SettingsProperties& settings);
+	void fromJson(const ruc::Json& object, SettingsProperties& settings);
 
-	void to_json(json& object, const WindowProperties& window);
-	void from_json(const json& object, WindowProperties& window);
+	void toJson(ruc::Json& object, const WindowProperties& window);
+	void fromJson(const ruc::Json& object, WindowProperties& window);
 
-}
+} // namespace Inferno
 
 #endif // SETTINGS_H
diff --git a/src/inferno/util/json.h b/src/inferno/util/json.h
index f122042..07aa402 100644
--- a/src/inferno/util/json.h
+++ b/src/inferno/util/json.h
@@ -1,6 +1,7 @@
 #ifndef JSON_UTIL_H
 #define JSON_UTIL_H
 
+#if 0
 #include <cstdint>  // int32_t, uint32_t
 #include <optional> // std::optional
 #include <vector>   // std::vector
@@ -246,6 +247,7 @@ namespace Inferno {
 	};
 
 } // namespace Inferno
+#endif
 
 #endif // JSON_UTIL_H