diff --git a/modules/client/client.lua b/modules/client/client.lua
index 52de7e1a..de112f8b 100644
--- a/modules/client/client.lua
+++ b/modules/client/client.lua
@@ -31,10 +31,6 @@ end
 
 function Client.init()
   setupWindow()
-
-  if not g_sprites.isLoaded() or not g_thingsType.isLoaded() then
-    fatal("spr and dat files are not loaded, are them missing?")
-  end
 end
 
 function Client.terminate()
diff --git a/modules/client_tibiafiles b/modules/client_tibiafiles
index 81e6ef44..981d77dd 160000
--- a/modules/client_tibiafiles
+++ b/modules/client_tibiafiles
@@ -1 +1 @@
-Subproject commit 81e6ef44c73edc5037512cdee3b2f75a23331521
+Subproject commit 981d77dd293a29deeb3f411602c0816ff295edcf
diff --git a/src/framework/luascript/luavaluecasts.cpp b/src/framework/luascript/luavaluecasts.cpp
index c969b310..caefde52 100644
--- a/src/framework/luascript/luavaluecasts.cpp
+++ b/src/framework/luascript/luavaluecasts.cpp
@@ -50,6 +50,21 @@ bool luavalue_cast(int index, int& i)
     return true;
 }
 
+// uint
+void push_luavalue(uint v)
+{
+    push_luavalue((double)v);
+}
+
+bool luavalue_cast(int index, uint& v)
+{
+    double d;
+    bool ret = luavalue_cast(index, d);
+    v = (uint32)d;
+    return ret;
+}
+
+
 // double
 void push_luavalue(double d)
 {
diff --git a/src/framework/luascript/luavaluecasts.h b/src/framework/luascript/luavaluecasts.h
index 3d850931..320b3f1b 100644
--- a/src/framework/luascript/luavaluecasts.h
+++ b/src/framework/luascript/luavaluecasts.h
@@ -36,6 +36,10 @@ bool luavalue_cast(int index, bool& b);
 void push_luavalue(int i);
 bool luavalue_cast(int index, int& i);
 
+// uint
+void push_luavalue(uint v);
+bool luavalue_cast(int index, uint& v);
+
 // double
 void push_luavalue(double d);
 bool luavalue_cast(int index, double& d);
diff --git a/src/otclient/luafunctions.cpp b/src/otclient/luafunctions.cpp
index fae18c97..96ba5b4b 100644
--- a/src/otclient/luafunctions.cpp
+++ b/src/otclient/luafunctions.cpp
@@ -47,10 +47,12 @@ void OTClient::registerLuaFunctions()
     g_lua.registerStaticClass("g_thingsType");
     g_lua.bindClassStaticFunction("g_thingsType", "load", std::bind(&ThingsType::load, &g_thingsType, _1));
     g_lua.bindClassStaticFunction("g_thingsType", "isLoaded", std::bind(&ThingsType::isLoaded, &g_thingsType));
+    g_lua.bindClassStaticFunction("g_thingsType", "getSignature", std::bind(&ThingsType::getSignature, &g_thingsType));
 
     g_lua.registerStaticClass("g_sprites");
     g_lua.bindClassStaticFunction("g_sprites", "load", std::bind(&SpriteManager::load, &g_sprites, _1));
     g_lua.bindClassStaticFunction("g_sprites", "isLoaded", std::bind(&SpriteManager::isLoaded, &g_sprites));
+    g_lua.bindClassStaticFunction("g_sprites", "getSignature", std::bind(&SpriteManager::getSignature, &g_sprites));
 
     g_lua.bindGlobalFunction("exit", std::bind(&Application::exit, g_app));
     g_lua.bindGlobalFunction("getOufitColor", Outfit::getColor);