diff --git a/Main.py b/Main.py
index fd7d8d9a..67c861c0 100644
--- a/Main.py
+++ b/Main.py
@@ -1,9 +1,11 @@
 import collections
+from collections.abc import Mapping
 import concurrent.futures
 import logging
 import os
 import tempfile
 import time
+from typing import Any
 import zipfile
 import zlib
 
@@ -239,11 +241,13 @@ def main(args, seed=None, baked_server_options: dict[str, object] | None = None)
             def write_multidata():
                 import NetUtils
                 from NetUtils import HintStatus
-                slot_data = {}
-                client_versions = {}
-                games = {}
-                minimum_versions = {"server": AutoWorld.World.required_server_version, "clients": client_versions}
-                slot_info = {}
+                slot_data: dict[int, Mapping[str, Any]] = {}
+                client_versions: dict[int, tuple[int, int, int]] = {}
+                games: dict[int, str] = {}
+                minimum_versions: NetUtils.MinimumVersions = {
+                    "server": AutoWorld.World.required_server_version, "clients": client_versions
+                }
+                slot_info: dict[int, NetUtils.NetworkSlot] = {}
                 names = [[name for player, name in sorted(multiworld.player_name.items())]]
                 for slot in multiworld.player_ids:
                     player_world: AutoWorld.World = multiworld.worlds[slot]
@@ -258,7 +262,9 @@ def main(args, seed=None, baked_server_options: dict[str, object] | None = None)
                                                            group_members=sorted(group["players"]))
                 precollected_items = {player: [item.code for item in world_precollected if type(item.code) == int]
                                       for player, world_precollected in multiworld.precollected_items.items()}
-                precollected_hints = {player: set() for player in range(1, multiworld.players + 1 + len(multiworld.groups))}
+                precollected_hints: dict[int, set[NetUtils.Hint]] = {
+                    player: set() for player in range(1, multiworld.players + 1 + len(multiworld.groups))
+                }
 
                 for slot in multiworld.player_ids:
                     slot_data[slot] = multiworld.worlds[slot].fill_slot_data()
@@ -315,7 +321,7 @@ def main(args, seed=None, baked_server_options: dict[str, object] | None = None)
                     if current_sphere:
                         spheres.append(dict(current_sphere))
 
-                multidata = {
+                multidata: NetUtils.MultiData | bytes = {
                     "slot_data": slot_data,
                     "slot_info": slot_info,
                     "connect_names": {name: (0, player) for player, name in multiworld.player_name.items()},
@@ -325,7 +331,7 @@ def main(args, seed=None, baked_server_options: dict[str, object] | None = None)
                     "er_hint_data": er_hint_data,
                     "precollected_items": precollected_items,
                     "precollected_hints": precollected_hints,
-                    "version": tuple(version_tuple),
+                    "version": (version_tuple.major, version_tuple.minor, version_tuple.build),
                     "tags": ["AP"],
                     "minimum_versions": minimum_versions,
                     "seed_name": multiworld.seed_name,
@@ -333,6 +339,7 @@ def main(args, seed=None, baked_server_options: dict[str, object] | None = None)
                     "datapackage": data_package,
                     "race_mode": int(multiworld.is_race),
                 }
+                # TODO: change to `"version": version_tuple` after getting better serialization
                 AutoWorld.call_all(multiworld, "modify_multidata", multidata)
 
                 for key in ("slot_data", "er_hint_data"):
diff --git a/MultiServer.py b/MultiServer.py
index 59960a2a..11a9e394 100644
--- a/MultiServer.py
+++ b/MultiServer.py
@@ -43,7 +43,7 @@ import NetUtils
 import Utils
 from Utils import version_tuple, restricted_loads, Version, async_start, get_intended_text
 from NetUtils import Endpoint, ClientStatus, NetworkItem, decode, encode, NetworkPlayer, Permission, NetworkSlot, \
-    SlotType, LocationStore, Hint, HintStatus
+    SlotType, LocationStore, MultiData, Hint, HintStatus
 from BaseClasses import ItemClassification
 
 
@@ -445,7 +445,7 @@ class Context:
             raise Utils.VersionException("Incompatible multidata.")
         return restricted_loads(zlib.decompress(data[1:]))
 
-    def _load(self, decoded_obj: dict, game_data_packages: typing.Dict[str, typing.Any],
+    def _load(self, decoded_obj: MultiData, game_data_packages: typing.Dict[str, typing.Any],
               use_embedded_server_options: bool):
 
         self.read_data = {}
diff --git a/NetUtils.py b/NetUtils.py
index cc6e917c..45279183 100644
--- a/NetUtils.py
+++ b/NetUtils.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from collections.abc import Mapping, Sequence
 import typing
 import enum
 import warnings
@@ -83,7 +84,7 @@ class NetworkSlot(typing.NamedTuple):
     name: str
     game: str
     type: SlotType
-    group_members: typing.Union[typing.List[int], typing.Tuple] = ()  # only populated if type == group
+    group_members: Sequence[int] = ()  # only populated if type == group
 
 
 class NetworkItem(typing.NamedTuple):
@@ -471,6 +472,42 @@ class _LocationStore(dict, typing.MutableMapping[int, typing.Dict[int, typing.Tu
                         location_id not in checked])
 
 
+class MinimumVersions(typing.TypedDict):
+    server: tuple[int, int, int]
+    clients: dict[int, tuple[int, int, int]]
+
+
+class GamesPackage(typing.TypedDict, total=False):
+    item_name_groups: dict[str, list[str]]
+    item_name_to_id: dict[str, int]
+    location_name_groups: dict[str, list[str]]
+    location_name_to_id: dict[str, int]
+    checksum: str
+
+
+class DataPackage(typing.TypedDict):
+    games: dict[str, GamesPackage]
+
+
+class MultiData(typing.TypedDict):
+    slot_data: dict[int, Mapping[str, typing.Any]]
+    slot_info: dict[int, NetworkSlot]
+    connect_names: dict[str, tuple[int, int]]
+    locations: dict[int, dict[int, tuple[int, int, int]]]
+    checks_in_area: dict[int, dict[str, int | list[int]]]
+    server_options: dict[str, object]
+    er_hint_data: dict[int, dict[int, str]]
+    precollected_items: dict[int, list[int]]
+    precollected_hints: dict[int, set[Hint]]
+    version: tuple[int, int, int]
+    tags: list[str]
+    minimum_versions: MinimumVersions
+    seed_name: str
+    spheres: list[dict[int, set[int]]]
+    datapackage: dict[str, GamesPackage]
+    race_mode: int
+
+
 if typing.TYPE_CHECKING:  # type-check with pure python implementation until we have a typing stub
     LocationStore = _LocationStore
 else:
diff --git a/WebHostLib/upload.py b/WebHostLib/upload.py
index 4c5d411d..48885e9c 100644
--- a/WebHostLib/upload.py
+++ b/WebHostLib/upload.py
@@ -13,9 +13,8 @@ from pony.orm.core import TransactionIntegrityError
 import schema
 
 import MultiServer
-from NetUtils import SlotType
+from NetUtils import GamesPackage, SlotType
 from Utils import VersionException, __version__
-from worlds import GamesPackage
 from worlds.Files import AutoPatchRegister
 from worlds.AutoWorld import data_package_checksum
 from . import app
diff --git a/docs/world api.md b/docs/world api.md
index 3bf48219..17cf81fe 100644
--- a/docs/world api.md	
+++ b/docs/world api.md	
@@ -539,7 +539,7 @@ In addition, the following methods can be implemented and are called in this ord
   creates the output files if there is output to be generated. When this is called,
   `self.multiworld.get_locations(self.player)` has all locations for the player, with attribute `item` pointing to the
   item. `location.item.player` can be used to see if it's a local item.
-* `fill_slot_data(self)` and `modify_multidata(self, multidata: Dict[str, Any])` can be used to modify the data that
+* `fill_slot_data(self)` and `modify_multidata(self, multidata: MultiData)` can be used to modify the data that
   will be used by the server to host the MultiWorld.
 
 All instance methods can, optionally, have a class method defined which will be called after all instance methods are
diff --git a/worlds/AutoWorld.py b/worlds/AutoWorld.py
index 6c1683e3..568bdcf9 100644
--- a/worlds/AutoWorld.py
+++ b/worlds/AutoWorld.py
@@ -16,7 +16,7 @@ from Utils import deprecate
 
 if TYPE_CHECKING:
     from BaseClasses import MultiWorld, Item, Location, Tutorial, Region, Entrance
-    from . import GamesPackage
+    from NetUtils import GamesPackage, MultiData
     from settings import Group
 
 perf_logger = logging.getLogger("performance")
@@ -450,7 +450,7 @@ class World(metaclass=AutoWorldRegister):
         """
         pass
 
-    def modify_multidata(self, multidata: Dict[str, Any]) -> None:  # TODO: TypedDict for multidata?
+    def modify_multidata(self, multidata: "MultiData") -> None:
         """For deeper modification of server multidata."""
         pass
 
diff --git a/worlds/__init__.py b/worlds/__init__.py
index 7db651bd..80240275 100644
--- a/worlds/__init__.py
+++ b/worlds/__init__.py
@@ -7,8 +7,9 @@ import warnings
 import zipimport
 import time
 import dataclasses
-from typing import Dict, List, TypedDict
+from typing import List
 
+from NetUtils import DataPackage
 from Utils import local_path, user_path
 
 local_folder = os.path.dirname(__file__)
@@ -24,8 +25,6 @@ __all__ = {
     "world_sources",
     "local_folder",
     "user_folder",
-    "GamesPackage",
-    "DataPackage",
     "failed_world_loads",
 }
 
@@ -33,18 +32,6 @@ __all__ = {
 failed_world_loads: List[str] = []
 
 
-class GamesPackage(TypedDict, total=False):
-    item_name_groups: Dict[str, List[str]]
-    item_name_to_id: Dict[str, int]
-    location_name_groups: Dict[str, List[str]]
-    location_name_to_id: Dict[str, int]
-    checksum: str
-
-
-class DataPackage(TypedDict):
-    games: Dict[str, GamesPackage]
-
-
 @dataclasses.dataclass(order=True)
 class WorldSource:
     path: str  # typically relative path from this module