diff --git a/src/lua-module.cpp b/src/lua-module.cpp
index 33a70df..933e411 100644
--- a/src/lua-module.cpp
+++ b/src/lua-module.cpp
@@ -8,35 +8,16 @@ extern "C"
 #include "threading.h"
 #include "shared-table.h"
 
-sol::table core::init_state(sol::state_view& lua)
+extern "C" int luaopen_libwoofer(lua_State *L)
 {
-    sol::usertype<LuaThread> thread_api(
-        sol::call_construction(), sol::constructors<sol::types<sol::function, sol::variadic_args>>(),
-        "join",      &LuaThread::join,
-        "thread_id", &LuaThread::thread_id
-    );
-    sol::stack::push(lua, thread_api);
-    auto thread_obj = sol::stack::pop<sol::object>(lua);
-
-    sol::usertype<core::SharedTable> share_api(
-        sol::call_construction(), sol::default_constructor,
-        sol::meta_function::new_index, &core::SharedTable::luaSet,
-        sol::meta_function::index,     &core::SharedTable::luaGet
-    );
-    sol::stack::push(lua, share_api);
-    auto share_obj = sol::stack::pop<sol::object>(lua);
-
+    sol::state_view lua(L);
+    auto thread_obj = threading::LuaThread::get_user_type(lua);
+    auto share_obj = share_data::SharedTable::get_user_type(lua);
     sol::table public_api = lua.create_table_with(
         "thread", thread_obj,
         "share",  share_obj
     );
-    return public_api;
-}
-
-extern "C" int luaopen_libwoofer(lua_State *L)
-{
-    sol::state_view lua(L);
-    sol::stack::push(lua, core::init_state(lua));
+    sol::stack::push(lua, public_api);
     return 1;
 }
 
diff --git a/src/shared-table.cpp b/src/shared-table.cpp
index a11353b..dd85ad3 100644
--- a/src/shared-table.cpp
+++ b/src/shared-table.cpp
@@ -3,13 +3,17 @@
 #include <cassert>
 #include <mutex>
 
-namespace core {
+namespace share_data {
 
-void SharedTable::bind(sol::state_view& lua) noexcept {
-    lua.new_usertype<SharedTable>("shared_table",
-                                  sol::meta_function::new_index, &SharedTable::luaSet,
-                                  sol::meta_function::index, &SharedTable::luaGet,
-                                  sol::meta_function::length, &SharedTable::size);
+sol::object SharedTable::get_user_type(sol::state_view& lua) noexcept {
+    static sol::usertype<share_data::SharedTable> type(
+            sol::call_construction(), sol::default_constructor,
+            sol::meta_function::new_index, &share_data::SharedTable::luaSet,
+            sol::meta_function::index,     &share_data::SharedTable::luaGet,
+            sol::meta_function::length, &SharedTable::size
+    );
+    sol::stack::push(lua, type);
+    return sol::stack::pop<sol::object>(lua);
 }
 
 void SharedTable::luaSet(sol::stack_object luaKey, sol::stack_object luaValue) noexcept {
@@ -65,4 +69,4 @@ TablePool& defaultPool() noexcept {
     return pool;
 }
 
-} // core
\ No newline at end of file
+} // core
diff --git a/src/shared-table.h b/src/shared-table.h
index c640f19..f1c9a37 100644
--- a/src/shared-table.h
+++ b/src/shared-table.h
@@ -9,9 +9,7 @@
 #include <memory>
 #include <vector>
 
-namespace core {
-
-sol::table init_state(sol::state_view& lua);
+namespace share_data {
 
 class SharedTable {
 public:
@@ -20,8 +18,7 @@ public:
     void luaSet(sol::stack_object luaKey, sol::stack_object luaValue) noexcept;
     sol::object luaGet(sol::stack_object key, sol::this_state state) noexcept;
 
-    // Add usertype to state
-    static void bind(sol::state_view& lua) noexcept;
+    static sol::object get_user_type(sol::state_view& lua) noexcept;
 
 private: // lau bindings
     size_t size() noexcept;
diff --git a/src/spin-mutex.h b/src/spin-mutex.h
index d497a32..f5b6537 100644
--- a/src/spin-mutex.h
+++ b/src/spin-mutex.h
@@ -3,7 +3,7 @@
 #include <atomic>
 #include <thread>
 
-namespace core {
+namespace share_data {
 
 class SpinMutex {
 public:
diff --git a/src/stored-object.cpp b/src/stored-object.cpp
index b72ddde..a3a05f6 100644
--- a/src/stored-object.cpp
+++ b/src/stored-object.cpp
@@ -7,7 +7,7 @@
 
 #include <cassert>
 
-namespace core {
+namespace share_data {
 
 bool FunctionHolder::rawCompare(const BaseHolder* other) const noexcept {
     return function_ == static_cast<const FunctionHolder*>(other)->function_;
@@ -79,4 +79,4 @@ bool StoredObject::operator<(const StoredObject& o) const noexcept {
         return data_.get() < o.data_.get();
 }
 
-} // core
+}
diff --git a/src/stored-object.h b/src/stored-object.h
index 60bc5a4..be2ff09 100644
--- a/src/stored-object.h
+++ b/src/stored-object.h
@@ -5,7 +5,7 @@
 #include <utility>
 #include <iostream>
 
-namespace core {
+namespace share_data {
 
 #define ERROR std::cerr
 
@@ -148,8 +148,8 @@ private:
 namespace std {
 
 template<>
-struct hash<core::StoredObject> {
-    std::size_t operator()(const core::StoredObject &object) const noexcept {
+struct hash<share_data::StoredObject> {
+    std::size_t operator()(const share_data::StoredObject &object) const noexcept {
         return object.hash();
     }
 };
diff --git a/src/threading.cpp b/src/threading.cpp
index 4f33a6c..0d91846 100644
--- a/src/threading.cpp
+++ b/src/threading.cpp
@@ -1,7 +1,8 @@
 #include "threading.h"
 
-LuaThread::LuaThread(const sol::function& function, const sol::variadic_args& args) noexcept
-{
+namespace threading {
+
+LuaThread::LuaThread(const sol::function& function, const sol::variadic_args& args) noexcept{
     // 1. Dump function to string
     sol::state_view lua(function.lua_state());
     str_function_ = lua["string"]["dump"](function);
@@ -13,8 +14,8 @@ LuaThread::LuaThread(const sol::function& function, const sol::variadic_args& ar
         sol::lib::base, sol::lib::string,
         sol::lib::package, sol::lib::io, sol::lib::os
     );
-    auto thread_table = core::init_state(*p_state_);
-    (void)thread_table;
+    get_user_type(*p_state_);
+    share_data::SharedTable::get_user_type(*p_state_);
 
     // 3. Save parameters
     validate_args(args);
@@ -34,7 +35,7 @@ void LuaThread::validate_args(const sol::variadic_args& args) noexcept
     const auto end = --args.end();
     for(auto iter = args.begin(); iter != end; iter++)
     {
-        core::StoredObject store(iter->get<sol::object>());
+        share_data::StoredObject store(iter->get<sol::object>());
         arguments_.push_back(store.unpack(sol::this_state{p_state_->lua_state()}));
     }
 }
@@ -64,3 +65,16 @@ std::string LuaThread::thread_id() noexcept
     ss << std::this_thread::get_id();
     return ss.str();
 }
+
+sol::object LuaThread::get_user_type(sol::state_view& lua) noexcept
+{
+    static sol::usertype<LuaThread> type(
+        sol::call_construction(), sol::constructors<sol::types<sol::function, sol::variadic_args>>(),
+        "join",      &LuaThread::join,
+        "thread_id", &LuaThread::thread_id
+    );
+    sol::stack::push(lua, type);
+    return sol::stack::pop<sol::object>(lua);
+}
+
+}
diff --git a/src/threading.h b/src/threading.h
index b0d1c62..54df6cc 100644
--- a/src/threading.h
+++ b/src/threading.h
@@ -7,13 +7,17 @@
 
 #include "shared-table.h"
 
+namespace threading {
+
 class LuaThread
 {
 public:
     LuaThread(const sol::function& function, const sol::variadic_args& args) noexcept;
     virtual ~LuaThread() noexcept;
     void join() noexcept;
+
     static std::string thread_id() noexcept;
+    static sol::object get_user_type(sol::state_view& lua) noexcept;
 
 private:
     void work() noexcept;
@@ -24,3 +28,5 @@ private:
     std::shared_ptr<std::thread> p_thread_;
     std::vector<sol::object> arguments_;
 };
+
+}