diff --git a/CMakeLists.txt b/CMakeLists.txt
index 82ed94d4..f76dc3bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,9 +22,9 @@ include_directories(external)
 #------------------------------------------------------------------------------
 # Compiler flags
 #------------------------------------------------------------------------------
-set(DEBUG_GCC_FLAGS -g -Og -Wall -Wextra -Wfatal-errors)
-set(RELEASE_GCC_FLAGS -O3 -Wall -Wextra -Wfatal-errors)
-set(RELWITHDEB_GCC_FLAGS -g -O3 -Wall -Wextra -Wfatal-errors)
+set(DEBUG_GCC_FLAGS -g -Og -Wall -Wextra -Wfatal-errors -Wno-unused-parameter)
+set(RELEASE_GCC_FLAGS -O3 -Wall -Wextra -Wfatal-errors -Wno-unused-parameter)
+set(RELWITHDEB_GCC_FLAGS -g -O3 -Wall -Wextra -Wfatal-errors -Wno-unused-parameter)
 
 set(CMAKE_CXX_STANDARD 17)
 
diff --git a/external/sol2 b/external/sol2
index 465b472b..c068aefb 160000
--- a/external/sol2
+++ b/external/sol2
@@ -1 +1 @@
-Subproject commit 465b472b2c67743ca095f7fac1ee2c3843175851
+Subproject commit c068aefbeddb3dd1f1fd38d42843ecb49a3b4cdb
diff --git a/source/common/core/Registry.hpp b/source/common/core/Registry.hpp
index 674512e3..df0f92b6 100644
--- a/source/common/core/Registry.hpp
+++ b/source/common/core/Registry.hpp
@@ -135,8 +135,8 @@ class Registry : public gk::ISerializable {
 
 		static void initUsertype(sol::state &lua);
 
-		const std::vector<std::unique_ptr<Block>> &blocks() const { return m_blocks; }
-		const std::vector<std::unique_ptr<Item>> &items() const { return m_items; }
+		const std::vector<std::shared_ptr<Block>> &blocks() const { return m_blocks; }
+		const std::vector<std::shared_ptr<Item>> &items() const { return m_items; }
 		const std::vector<Tree> &trees() const { return m_trees; }
 		const std::vector<Biome> &biomes() const { return m_biomes; }
 		const std::vector<Dimension> &dimensions() const { return m_dimensions; }
@@ -148,9 +148,9 @@ class Registry : public gk::ISerializable {
 	private:
 		static Registry *s_instance;
 
-		std::vector<std::unique_ptr<Block>> m_blocks;
-		std::vector<std::unique_ptr<Item>> m_items;
-		std::vector<std::unique_ptr<Recipe>> m_recipes;
+		std::vector<std::shared_ptr<Block>> m_blocks;
+		std::vector<std::shared_ptr<Item>> m_items;
+		std::vector<std::shared_ptr<Recipe>> m_recipes;
 		std::vector<Sky> m_skies;
 		std::vector<Tree> m_trees;
 		std::vector<Biome> m_biomes;