diff --git a/README.md b/README.md
index 5610b46..42ad621 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This is an engine module! Which means that you will need to compile it into Godo
 
 You can find a demonstration project here: https://github.com/Relintai/the_tower
 
-It supports both godot 3.2 and 4.0 (master). Note that since 4.0 is still in very early stages I only 
+It supports both godot 3.2 and 4.0 (master [last tested commit](https://github.com/godotengine/godot/commit/b7e10141197fdd9b0dbc4cfa7890329510d36540)). Note that since 4.0 is still in very early stages I only 
 check whether it works from time to time.
 
 ## Optional Dependencies
diff --git a/areas/world_area.h b/areas/world_area.h
index 6105412..7078c69 100644
--- a/areas/world_area.h
+++ b/areas/world_area.h
@@ -23,10 +23,18 @@ SOFTWARE.
 #ifndef WORLD_AREA_H
 #define WORLD_AREA_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#include "core/string/ustring.h"
+#else
 #include "core/reference.h"
+#include "core/ustring.h"
+#endif
 
 #include "core/math/aabb.h"
-#include "core/ustring.h"
+
 #include "scene/resources/texture.h"
 
 class WorldArea : public Reference {
diff --git a/data/voxel_light.h b/data/voxel_light.h
index 4374ae8..9f435cc 100644
--- a/data/voxel_light.h
+++ b/data/voxel_light.h
@@ -23,9 +23,17 @@ SOFTWARE.
 #ifndef VOXEL_LIGHT_H
 #define VOXEL_LIGHT_H
 
-#include "core/color.h"
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#include "core/templates/vector.h"
+#include "core/math/color.h"
+#else
 #include "core/reference.h"
 #include "core/vector.h"
+#include "core/color.h"
+#endif
 
 class VoxelLight : public Reference {
 	GDCLASS(VoxelLight, Reference);
diff --git a/defines.h b/defines.h
index 873b64d..1f61690 100644
--- a/defines.h
+++ b/defines.h
@@ -18,7 +18,7 @@
 #define light_h "scene/3d/light_3d.h"
 #define visual_server_h "servers/rendering_server.h"
 #define mesh_instance_h "scene/3d/mesh_instance_3d.h"
-#define pool_vector_h "core/vector.h"
+#define pool_vector_h "core/templates/vector.h"
 #define physics_server_h "servers/physics_server_3d.h"
 #define immediate_geometry_h "scene/3d/immediate_geometry_3d.h"
 #define include_pool_vector \
diff --git a/level_generator/voxelman_level_generator.h b/level_generator/voxelman_level_generator.h
index ef952cf..d696ec1 100644
--- a/level_generator/voxelman_level_generator.h
+++ b/level_generator/voxelman_level_generator.h
@@ -23,7 +23,13 @@ SOFTWARE.
 #ifndef VOXELMAN_LEVEL_GENERATOR_H
 #define VOXELMAN_LEVEL_GENERATOR_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#else
 #include "core/resource.h"
+#endif
 
 class VoxelChunk;
 
diff --git a/library/voxel_surface.h b/library/voxel_surface.h
index 48090a9..fdeb635 100644
--- a/library/voxel_surface.h
+++ b/library/voxel_surface.h
@@ -23,11 +23,20 @@ SOFTWARE.
 #ifndef VOXEL_SURFACE_H
 #define VOXEL_SURFACE_H
 
-#include "core/resource.h"
 
-#include "core/color.h"
-#include "core/math/rect2.h"
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#include "core/templates/vector.h"
+#include "core/math/color.h"
+#else
+#include "core/resource.h"
 #include "core/vector.h"
+#include "core/color.h"
+#endif
+
+#include "core/math/rect2.h"
 #include "scene/resources/material.h"
 
 #include "voxelman_library.h"
diff --git a/library/voxelman_library.h b/library/voxelman_library.h
index 4c42a2e..c47f691 100644
--- a/library/voxelman_library.h
+++ b/library/voxelman_library.h
@@ -23,8 +23,15 @@ SOFTWARE.
 #ifndef VOXELMAN_LIBRARY_H
 #define VOXELMAN_LIBRARY_H
 
-#include "core/math/rect2.h"
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#else
 #include "core/resource.h"
+#endif
+
+#include "core/math/rect2.h"
 #include "scene/resources/material.h"
 
 #include "../data/voxel_light.h"
diff --git a/library/voxelman_library_merger.h b/library/voxelman_library_merger.h
index 73636b2..ca5f3c4 100644
--- a/library/voxelman_library_merger.h
+++ b/library/voxelman_library_merger.h
@@ -23,10 +23,18 @@ SOFTWARE.
 #ifndef VOXELMAN_LIBRARY_MERGER_H
 #define VOXELMAN_LIBRARY_MERGER_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#include "core/templates/map.h"
+#else
+#include "core/resource.h"
+#include "core/map.h"
+#endif
+
 #include "voxelman_library.h"
 
-#include "core/map.h"
-#include "core/resource.h"
 #include "scene/resources/material.h"
 
 #include "../data/voxel_light.h"
diff --git a/library/voxelman_library_simple.h b/library/voxelman_library_simple.h
index 20b6be2..0df9486 100644
--- a/library/voxelman_library_simple.h
+++ b/library/voxelman_library_simple.h
@@ -23,9 +23,16 @@ SOFTWARE.
 #ifndef VOXELMAN_LIBRARY_SIMPLE_H
 #define VOXELMAN_LIBRARY_SIMPLE_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#else
+#include "core/resource.h"
+#endif
+
 #include "voxelman_library.h"
 
-#include "core/resource.h"
 #include "scene/resources/material.h"
 
 #include "../data/voxel_light.h"
diff --git a/meshers/blocky/voxel_mesher_blocky.h b/meshers/blocky/voxel_mesher_blocky.h
index 55ccb91..0cf7965 100644
--- a/meshers/blocky/voxel_mesher_blocky.h
+++ b/meshers/blocky/voxel_mesher_blocky.h
@@ -23,7 +23,14 @@ SOFTWARE.
 #ifndef VOXEL_MESHER_BLOCKY_H
 #define VOXEL_MESHER_BLOCKY_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/math/color.h"
+#else
 #include "core/color.h"
+#endif
+
 #include "core/math/vector2.h"
 #include "core/math/vector3.h"
 
diff --git a/meshers/blocky/voxel_mesher_liquid_blocky.h b/meshers/blocky/voxel_mesher_liquid_blocky.h
index b5632ec..57870d3 100644
--- a/meshers/blocky/voxel_mesher_liquid_blocky.h
+++ b/meshers/blocky/voxel_mesher_liquid_blocky.h
@@ -23,7 +23,14 @@ SOFTWARE.
 #ifndef VOXEL_MESHER_LIQUID_BLOCKY_H
 #define VOXEL_MESHER_LIQUID_BLOCKY_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/math/color.h"
+#else
 #include "core/color.h"
+#endif
+
 #include "core/math/vector2.h"
 #include "core/math/vector3.h"
 
diff --git a/meshers/cubic/voxel_cube_points.h b/meshers/cubic/voxel_cube_points.h
index fcc668e..90f2bed 100644
--- a/meshers/cubic/voxel_cube_points.h
+++ b/meshers/cubic/voxel_cube_points.h
@@ -23,8 +23,15 @@ SOFTWARE.
 #ifndef SUB_VOXEL_POINTS_H
 #define SUB_VOXEL_POINTS_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#include "core/templates/vector.h"
+#else
 #include "core/reference.h"
 #include "core/vector.h"
+#endif
 
 class VoxelChunk;
 class SubVoxelFacePointsHelper;
diff --git a/meshers/cubic/voxel_mesher_cubic.h b/meshers/cubic/voxel_mesher_cubic.h
index 57fbf62..ec69d1b 100644
--- a/meshers/cubic/voxel_mesher_cubic.h
+++ b/meshers/cubic/voxel_mesher_cubic.h
@@ -23,7 +23,14 @@ SOFTWARE.
 #ifndef VOXEL_MESHER_CUBIC_H
 #define VOXEL_MESHER_CUBIC_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/math/color.h"
+#else
 #include "core/color.h"
+#endif
+
 #include "core/math/vector2.h"
 #include "core/math/vector3.h"
 
diff --git a/meshers/default/voxel_mesher_default.h b/meshers/default/voxel_mesher_default.h
index abf7814..cbe0d1c 100644
--- a/meshers/default/voxel_mesher_default.h
+++ b/meshers/default/voxel_mesher_default.h
@@ -23,7 +23,14 @@ SOFTWARE.
 #ifndef VOXEL_MESHER_DEFAULT_H
 #define VOXEL_MESHER_DEFAULT_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/math/color.h"
+#else
 #include "core/color.h"
+#endif
+
 #include "core/math/vector2.h"
 #include "core/math/vector3.h"
 
diff --git a/meshers/marching_cubes/marching_cubes_cell_data.h b/meshers/marching_cubes/marching_cubes_cell_data.h
index e757b60..653eb4e 100644
--- a/meshers/marching_cubes/marching_cubes_cell_data.h
+++ b/meshers/marching_cubes/marching_cubes_cell_data.h
@@ -23,7 +23,13 @@ SOFTWARE.
 #ifndef MARCHING_CUBES_CELL_DATA_H
 #define MARCHING_CUBES_CELL_DATA_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#else
 #include "core/reference.h"
+#endif
 
 #include "marching_cubes_tables.h"
 
diff --git a/meshers/marching_cubes/voxel_mesher_marching_cubes.cpp b/meshers/marching_cubes/voxel_mesher_marching_cubes.cpp
index 33d9f38..2945c28 100644
--- a/meshers/marching_cubes/voxel_mesher_marching_cubes.cpp
+++ b/meshers/marching_cubes/voxel_mesher_marching_cubes.cpp
@@ -20,12 +20,20 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/variant/array.h"
+#include "core/variant/dictionary.h"
+#else
+#include "core/array.h"
+#include "core/dictionary.h"
+#endif
+
 #include "voxel_mesher_marching_cubes.h"
 
 #include "../../world/default/voxel_chunk_default.h"
 #include "../../world/voxel_chunk.h"
-#include "core/array.h"
-#include "core/dictionary.h"
 
 #include "../../world/jobs/voxel_job.h"
 
diff --git a/meshers/marching_cubes/voxel_mesher_marching_cubes.h b/meshers/marching_cubes/voxel_mesher_marching_cubes.h
index 2f03225..1a7389e 100644
--- a/meshers/marching_cubes/voxel_mesher_marching_cubes.h
+++ b/meshers/marching_cubes/voxel_mesher_marching_cubes.h
@@ -23,8 +23,15 @@ SOFTWARE.
 #ifndef VOXEL_MESHER_MARCHING_CUBES_H
 #define VOXEL_MESHER_MARCHING_CUBES_H
 
-#include "../default/voxel_mesher_default.h"
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#else
 #include "core/reference.h"
+#endif
+
+#include "../default/voxel_mesher_default.h"
 
 #include "marching_cubes_cell_data.h"
 
diff --git a/meshers/voxel_mesher.h b/meshers/voxel_mesher.h
index 60f0505..4daa2b6 100644
--- a/meshers/voxel_mesher.h
+++ b/meshers/voxel_mesher.h
@@ -23,7 +23,17 @@ SOFTWARE.
 #ifndef VOXEL_TOOLS_H
 #define VOXEL_TOOLS_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#include "core/templates/vector.h"
+#include "core/math/color.h"
+#else
 #include "core/reference.h"
+#include "core/vector.h"
+#include "core/color.h"
+#endif
 
 #include "../defines.h"
 
@@ -32,11 +42,9 @@ include_pool_vector
 
 #include mesh_instance_h
 
-#include "core/color.h"
 #include "core/math/rect2.h"
 #include "core/math/vector2.h"
 #include "core/math/vector3.h"
-#include "core/vector.h"
 #include "scene/main/node.h"
 #include "scene/resources/material.h"
 #include "scene/resources/mesh.h"
diff --git a/world/block_voxel_structure.h b/world/block_voxel_structure.h
index 73afa1f..0851804 100644
--- a/world/block_voxel_structure.h
+++ b/world/block_voxel_structure.h
@@ -23,13 +23,21 @@ SOFTWARE.
 #ifndef BLOCK_VOXEL_STRUCTURE_H
 #define BLOCK_VOXEL_STRUCTURE_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/templates/vector.h"
+#else
+#include "core/vector.h"
+#endif
+
 #include "voxel_structure.h"
 
 #include "../defines.h"
 
 #include pool_vector_h
 include_pool_vector
-#include "core/vector.h"
+
 #include "voxel_chunk.h"
 		;
 
diff --git a/world/default/voxel_chunk_default.cpp b/world/default/voxel_chunk_default.cpp
index ad2e502..369be46 100644
--- a/world/default/voxel_chunk_default.cpp
+++ b/world/default/voxel_chunk_default.cpp
@@ -122,8 +122,13 @@ RID VoxelChunkDefault::mesh_rid_get(const int mesh_index, const int mesh_type_in
 
 	Variant v = m[mesh_type_index];
 
+#if VERSION_MAJOR > 3
+	if (v.get_type() != Variant::RID)
+		return RID();
+#else
 	if (v.get_type() != Variant::_RID)
 		return RID();
+#endif
 
 	return v;
 }
@@ -141,7 +146,11 @@ void VoxelChunkDefault::mesh_rid_set(const int mesh_index, const int mesh_type_i
 
 	Variant v = m[mesh_type_index];
 
+#if VERSION_MAJOR > 3
+	ERR_FAIL_COND(v.get_type() != Variant::RID);
+#else
 	ERR_FAIL_COND(v.get_type() != Variant::_RID);
+#endif
 
 	m[mesh_type_index] = value;
 	_rids[mesh_index] = m;
diff --git a/world/default/voxel_chunk_default.h b/world/default/voxel_chunk_default.h
index 115ff34..d8c8e6f 100644
--- a/world/default/voxel_chunk_default.h
+++ b/world/default/voxel_chunk_default.h
@@ -23,26 +23,31 @@ SOFTWARE.
 #ifndef VOXEL_CHUNK_DEFAULT_H
 #define VOXEL_CHUNK_DEFAULT_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/string/ustring.h"
+#include "core/config/engine.h"
+#include "core/variant/array.h"
+#else
+#include "core/ustring.h"
+#include "core/engine.h"
+#include "core/array.h"
+#endif
+
+
 #include "../voxel_chunk.h"
 
 #include "../../defines.h"
 
-#include "core/engine.h"
 #include "core/os/mutex.h"
 #include "core/os/thread.h"
 #include "core/os/thread_safe.h"
-#include "core/ustring.h"
-
-#include "core/array.h"
 
 #include "scene/resources/packed_scene.h"
-
 #include "../voxel_world.h"
-
 #include "../../data/voxel_light.h"
-
 #include "../../meshers/voxel_mesher.h"
-
 #include "../../library/voxel_surface.h"
 #include "../../library/voxelman_library.h"
 
diff --git a/world/environment_data.h b/world/environment_data.h
index 445a579..37d39b7 100644
--- a/world/environment_data.h
+++ b/world/environment_data.h
@@ -23,13 +23,20 @@ SOFTWARE.
 #ifndef ENVIRONMENT_DATA_H
 #define ENVIRONMENT_DATA_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#include "core/math/color.h"
+#else
+#include "core/resource.h"
+#include "core/color.h"
+#endif
+
 #include "../defines.h"
 
 #include light_h
 
-#include "core/color.h"
-#include "core/resource.h"
-
 #include "scene/3d/world_environment.h"
 #include "scene/main/node.h"
 
diff --git a/world/jobs/voxel_job.h b/world/jobs/voxel_job.h
index 2c3be49..023af5a 100644
--- a/world/jobs/voxel_job.h
+++ b/world/jobs/voxel_job.h
@@ -28,9 +28,17 @@ SOFTWARE.
 #if THREAD_POOL_PRESENT
 #include "../../../thread_pool/thread_pool_job.h"
 #else
+
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/object/reference.h"
+#else
 #include "core/reference.h"
 #endif
 
+#endif
+
 #include "../../defines.h"
 
 #if GODOT4
diff --git a/world/voxel_chunk.h b/world/voxel_chunk.h
index d4f7a51..06f76c1 100644
--- a/world/voxel_chunk.h
+++ b/world/voxel_chunk.h
@@ -23,20 +23,28 @@ SOFTWARE.
 #ifndef VOXEL_CHUNK_H
 #define VOXEL_CHUNK_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#include "core/string/ustring.h"
+#include "core/config/engine.h"
+#include "core/variant/array.h"
+#else
 #include "core/resource.h"
+#include "core/ustring.h"
+#include "core/engine.h"
+#include "core/array.h"
+#endif
 
 #include "../defines.h"
 
 #include pool_vector_h
 include_pool_vector
 
-#include "core/engine.h"
 #include "core/os/mutex.h"
 #include "core/os/thread.h"
 #include "core/os/thread_safe.h"
-#include "core/ustring.h"
-
-#include "core/array.h"
 
 #include "scene/resources/packed_scene.h"
 
diff --git a/world/voxel_structure.h b/world/voxel_structure.h
index 5dfe91a..67164af 100644
--- a/world/voxel_structure.h
+++ b/world/voxel_structure.h
@@ -23,14 +23,21 @@ SOFTWARE.
 #ifndef VOXEL_STRUCTURE_H
 #define VOXEL_STRUCTURE_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/io/resource.h"
+#include "core/templates/hash_map.h"
+#else
 #include "core/resource.h"
+#include "core/hash_map.h"
+#endif
 
 #include "../defines.h"
 
 #include pool_vector_h
 include_pool_vector
 
-#include "core/hash_map.h"
 #include "core/math/aabb.h"
 #include "voxel_chunk.h"
 
diff --git a/world/voxel_world.cpp b/world/voxel_world.cpp
index 00ee45b..0a40906 100644
--- a/world/voxel_world.cpp
+++ b/world/voxel_world.cpp
@@ -22,6 +22,8 @@ SOFTWARE.
 
 #include "voxel_world.h"
 
+#include "core/version.h"
+
 #include "voxel_chunk.h"
 #include "voxel_structure.h"
 
@@ -942,7 +944,11 @@ void VoxelWorld::_notification(int p_what) {
 				}
 			}
 
+#if VERSION_MAJOR > 3
+			if (_is_priority_generation && _generation_queue.is_empty() && _generating.is_empty()) {
+#else
 			if (_is_priority_generation && _generation_queue.empty() && _generating.empty()) {
+#endif
 				_is_priority_generation = false;
 
 				call("_generation_finished");
diff --git a/world/voxel_world.h b/world/voxel_world.h
index 516944a..ac9a594 100644
--- a/world/voxel_world.h
+++ b/world/voxel_world.h
@@ -23,13 +23,20 @@ SOFTWARE.
 #ifndef VOXEL_WORLD_H
 #define VOXEL_WORLD_H
 
+#include "core/version.h"
+
+#if VERSION_MAJOR > 3
+#include "core/templates/hash_map.h"
+#include "core/config/engine.h"
+#else
+#include "core/hash_map.h"
+#include "core/engine.h"
+#endif
+
 #include "../defines.h"
 
 #include navigation_h
 
-#include "core/engine.h"
-#include "core/hash_map.h"
-
 #include "../areas/world_area.h"
 #include "../level_generator/voxelman_level_generator.h"
 #include "../library/voxelman_library.h"