diff --git a/setup.cfg b/setup.cfg
index 22f792d4b..6d8134e91 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -74,7 +74,7 @@ install_requires =
     ujson==5.1.0  # required by aiocache
     urllib3==1.26.11
     uvloop==0.17.0
-    web3==6.0.0b9
+    web3==6.2.0
 
 dependency_links =
     https://github.com/aleph-im/py-libp2p/tarball/0.1.4-1-use-set#egg=libp2p
@@ -99,7 +99,7 @@ exclude =
 testing =
     ipfshttpclient==0.8.0a2  # eth/web3 test dependency, for some reason
     more-itertools==8.14.0
-    mypy==0.950
+    mypy==1.2.0
     pytest
     pytest-cov
     pytest-aiohttp
diff --git a/src/aleph/chains/chaindata.py b/src/aleph/chains/chaindata.py
index 367045a9b..1af14a4f6 100644
--- a/src/aleph/chains/chaindata.py
+++ b/src/aleph/chains/chaindata.py
@@ -1,6 +1,6 @@
 import asyncio
 import json
-from typing import Dict, Optional, List, Any, Mapping, Set, cast
+from typing import Dict, Optional, List, Any, Mapping, Set, cast, Type, Union
 
 from aleph_message.models import StoreContent, ItemType, Chain, MessageType
 from pydantic import ValidationError
@@ -177,7 +177,7 @@ def _get_tx_messages_smart_contract_protocol(tx: ChainTxDb) -> List[Dict[str, An
         Message validation should be left to the message processing pipeline.
         """
 
-        payload_model = (
+        payload_model: Union[Type[TezosMessageEventPayload], Type[MessageEvent]] = (
             TezosMessageEventPayload if tx.chain == Chain.TEZOS else MessageEvent
         )
 
diff --git a/src/aleph/chains/ethereum.py b/src/aleph/chains/ethereum.py
index 6f8b8a10d..1f9e69fc8 100644
--- a/src/aleph/chains/ethereum.py
+++ b/src/aleph/chains/ethereum.py
@@ -63,7 +63,7 @@ async def get_contract(config, web3: Web3):
 
 def get_logs_query(web3: Web3, contract, start_height, end_height):
     return web3.eth.get_logs(
-        {"address": contract.address, "fromBlock": start_height, "toBlock": end_height}  # type: ignore[arg-type]
+        {"address": contract.address, "fromBlock": start_height, "toBlock": end_height}
     )
 
 
diff --git a/src/aleph/commands.py b/src/aleph/commands.py
index f64e8170e..99ccdd4fd 100644
--- a/src/aleph/commands.py
+++ b/src/aleph/commands.py
@@ -66,7 +66,7 @@ async def init_node_cache(config: Config) -> NodeCache:
     return node_cache
 
 
-async def main(args):
+async def main(args: List[str]) -> None:
     """Main entry point allowing external calls
 
     Args:
@@ -82,7 +82,7 @@ async def main(args):
         key_pair = generate_keypair(args.print_key)
         save_keys(key_pair, args.key_dir)
         if args.print_key:
-            print(key_pair.private_key.impl.export_key().decode("utf-8"))
+            print(key_pair.private_key.impl.export_key().decode("utf-8"))  # type: ignore[attr-defined]
 
         return
 
diff --git a/src/aleph/schemas/api/messages.py b/src/aleph/schemas/api/messages.py
index dbf53bd03..5bba74961 100644
--- a/src/aleph/schemas/api/messages.py
+++ b/src/aleph/schemas/api/messages.py
@@ -1,5 +1,5 @@
 import datetime as dt
-from typing import Optional, Generic, TypeVar, Literal, List, Any, Union, Dict
+from typing import Optional, Generic, TypeVar, Literal, List, Any, Union, Dict, Mapping
 
 from aleph_message.models import (
     AggregateContent,
@@ -8,7 +8,7 @@
     ForgetContent,
     PostContent,
     ProgramContent,
-    StoreContent,
+    StoreContent, AlephMessage,
 )
 from aleph_message.models import MessageType, ItemType
 from pydantic import BaseModel
@@ -91,7 +91,7 @@ class StoreMessage(
 }
 
 
-def format_message(message: Any) -> BaseMessage:
+def format_message(message: Any) -> AlephMessage:
     message_cls = MESSAGE_CLS_DICT[message.type]
     return message_cls.from_orm(message)
 
@@ -164,7 +164,7 @@ class ForgottenMessageStatus(BaseMessageStatus):
 
 class RejectedMessageStatus(BaseMessageStatus):
     status: MessageStatus = MessageStatus.REJECTED
-    message: Dict[str, Any]
+    message: Mapping[str, Any]
     error_code: ErrorCode
     details: Any
 
diff --git a/src/aleph/schemas/base_messages.py b/src/aleph/schemas/base_messages.py
index c1cf693a9..b8edd3dbb 100644
--- a/src/aleph/schemas/base_messages.py
+++ b/src/aleph/schemas/base_messages.py
@@ -4,7 +4,7 @@
 
 import datetime as dt
 from hashlib import sha256
-from typing import Optional, Generic, TypeVar
+from typing import Optional, Generic, TypeVar, Any, Mapping, cast
 
 from aleph_message.models import BaseContent, Chain
 from aleph_message.models import MessageType, ItemType
@@ -62,7 +62,7 @@ def check_item_type(cls, values):
         return values
 
     @validator("item_hash")
-    def check_item_hash(cls, v, values):
+    def check_item_hash(cls, v: Any, values: Mapping[str, Any]):
         """
         For inline item types, check that the item hash is equal to
         the hash of the item content.
@@ -73,7 +73,7 @@ def check_item_hash(cls, v, values):
             raise ValueError("Could not determine item type")
 
         if item_type == ItemType.inline:
-            item_content: str = values.get("item_content")
+            item_content = cast(Optional[str], values.get("item_content"))
             if item_content is None:
                 raise ValueError("Could not find inline item content")
 
diff --git a/src/aleph/web/controllers/accounts.py b/src/aleph/web/controllers/accounts.py
index 12f05595c..7e037a00b 100644
--- a/src/aleph/web/controllers/accounts.py
+++ b/src/aleph/web/controllers/accounts.py
@@ -4,7 +4,7 @@
 
 from aiohttp import web
 from aleph_message.models import MessageType
-from pydantic import ValidationError
+from pydantic import ValidationError, parse_obj_as
 
 from aleph.db.accessors.balances import get_total_balance
 from aleph.db.accessors.files import (
@@ -15,7 +15,7 @@
 from aleph.schemas.api.accounts import (
     GetAccountBalanceResponse,
     GetAccountFilesResponse,
-    GetAccountFilesQueryParams,
+    GetAccountFilesQueryParams, GetAccountFilesResponseItem,
 )
 from aleph.types.db_session import DbSessionFactory
 from aleph.web.controllers.app_state_getters import get_session_factory_from_request
@@ -105,7 +105,7 @@ async def get_account_files(request: web.Request) -> web.Response:
         response = GetAccountFilesResponse(
             address=address,
             total_size=total_size,
-            files=file_pins,
+            files=parse_obj_as(List[GetAccountFilesResponseItem], file_pins),
             pagination_page=query_params.page,
             pagination_total=nb_files,
             pagination_per_page=query_params.pagination,
diff --git a/src/aleph/web/controllers/aggregates.py b/src/aleph/web/controllers/aggregates.py
index 9d38d19dc..223d6c9fd 100644
--- a/src/aleph/web/controllers/aggregates.py
+++ b/src/aleph/web/controllers/aggregates.py
@@ -28,7 +28,7 @@ def split_str(cls, v):
         return v
 
 
-async def address_aggregate(request):
+async def address_aggregate(request: web.Request) -> web.Response:
     """Returns the aggregate of an address.
     TODO: handle filter on a single key, or even subkey.
     """
diff --git a/src/aleph/web/controllers/channels.py b/src/aleph/web/controllers/channels.py
index 6ae1a3cff..b7c4b7c09 100644
--- a/src/aleph/web/controllers/channels.py
+++ b/src/aleph/web/controllers/channels.py
@@ -5,7 +5,8 @@
 
 from aleph.db.accessors.messages import get_distinct_channels
 from aleph.types.channel import Channel
-from aleph.types.db_session import DbSessionFactory, DbSession
+from aleph.types.db_session import DbSession
+from aleph.web.controllers.app_state_getters import get_session_factory_from_request
 
 
 @cached(ttl=60 * 120, cache=SimpleMemoryCache, timeout=120)
@@ -14,13 +15,13 @@ async def get_channels(session: DbSession) -> List[Channel]:
     return list(channels)
 
 
-async def used_channels(request):
+async def used_channels(request: web.Request) -> web.Response:
     """All used channels list
 
     TODO: do we need pagination?
     """
 
-    session_factory: DbSessionFactory = request.app["session_factory"]
+    session_factory = get_session_factory_from_request(request)
 
     with session_factory() as session:
         channels = await get_channels(session)
diff --git a/src/aleph/web/controllers/main.py b/src/aleph/web/controllers/main.py
index 07a441aca..8088926d9 100644
--- a/src/aleph/web/controllers/main.py
+++ b/src/aleph/web/controllers/main.py
@@ -14,7 +14,7 @@
 
 
 @aiohttp_jinja2.template("index.html")
-async def index(request) -> Dict:
+async def index(request: web.Request) -> Dict:
     """Index of aleph."""
 
     session_factory: DbSessionFactory = get_session_factory_from_request(request)
@@ -23,7 +23,7 @@ async def index(request) -> Dict:
         return asdict(await get_metrics(session=session, node_cache=node_cache))
 
 
-async def status_ws(request):
+async def status_ws(request: web.Request) -> web.WebSocketResponse:
     ws = web.WebSocketResponse()
     await ws.prepare(request)
 
@@ -47,13 +47,13 @@ async def status_ws(request):
         await asyncio.sleep(2)
 
 
-async def metrics(request):
+async def metrics(request: web.Request) -> web.Response:
     """Prometheus compatible metrics.
 
     Naming convention:
     https://prometheus.io/docs/practices/naming/
     """
-    session_factory: DbSessionFactory = get_session_factory_from_request(request)
+    session_factory = get_session_factory_from_request(request)
     node_cache = get_node_cache_from_request(request)
 
     with session_factory() as session:
@@ -64,7 +64,7 @@ async def metrics(request):
         )
 
 
-async def metrics_json(request):
+async def metrics_json(request: web.Request) -> web.Response:
     """JSON version of the Prometheus metrics."""
     session_factory: DbSessionFactory = get_session_factory_from_request(request)
     node_cache = get_node_cache_from_request(request)
diff --git a/src/aleph/web/controllers/messages.py b/src/aleph/web/controllers/messages.py
index 4c8d5465a..10d1b145b 100644
--- a/src/aleph/web/controllers/messages.py
+++ b/src/aleph/web/controllers/messages.py
@@ -31,6 +31,7 @@
 from aleph.types.db_session import DbSessionFactory, DbSession
 from aleph.types.message_status import MessageStatus
 from aleph.types.sort_order import SortOrder, SortBy
+from aleph.web.controllers.app_state_getters import get_session_factory_from_request
 from aleph.web.controllers.utils import (
     DEFAULT_MESSAGES_PER_PAGE,
     DEFAULT_PAGE,
@@ -195,7 +196,7 @@ def format_response(
     return web.json_response(text=aleph_json.dumps(response).decode("utf-8"))
 
 
-async def view_messages_list(request):
+async def view_messages_list(request: web.Request) -> web.Response:
     """Messages list view with filters"""
 
     try:
@@ -213,7 +214,7 @@ async def view_messages_list(request):
     pagination_page = query_params.page
     pagination_per_page = query_params.pagination
 
-    session_factory: DbSessionFactory = request.app["session_factory"]
+    session_factory = get_session_factory_from_request(request)
     with session_factory() as session:
         messages = get_matching_messages(
             session, include_confirmations=True, **find_filters
diff --git a/src/aleph/web/controllers/storage.py b/src/aleph/web/controllers/storage.py
index f261df896..8075ba2da 100644
--- a/src/aleph/web/controllers/storage.py
+++ b/src/aleph/web/controllers/storage.py
@@ -168,9 +168,13 @@ async def get_raw_hash(request):
     return response
 
 
-async def get_file_pins_count(request):
+async def get_file_pins_count(request: web.Request) -> web.Response:
     item_hash = request.match_info.get("hash", None)
-    session_factory: DbSessionFactory = request.app["session_factory"]
+
+    if item_hash is None:
+        raise web.HTTPBadRequest(text="No hash provided")
+
+    session_factory = get_session_factory_from_request(request)
     with session_factory() as session:
         count = count_file_pins(session=session, file_hash=item_hash)
     return web.json_response(data=count)
diff --git a/tests/chains/test_tezos.py b/tests/chains/test_tezos.py
index 6bd926d8c..11508fa8f 100644
--- a/tests/chains/test_tezos.py
+++ b/tests/chains/test_tezos.py
@@ -129,7 +129,7 @@ def test_datetime_to_iso_8601():
 def test_indexer_event_to_aleph_message(message_type: str, message_content: str):
     indexer_event = IndexerMessageEvent(
         source="KT1BfL57oZfptdtMFZ9LNakEPvuPPA2urdSW",
-        timestamp="2022-11-16T00:00:00Z",
+        timestamp=dt.datetime(2022, 11, 16, tzinfo=dt.timezone.utc),
         type="MessageEvent",
         operationHash="oorMNgusX6RxZ4NhzYriVDN8HDeMBNkjD3E8kx9a7j7dRRDGkzz",
         blockLevel=584664,
diff --git a/tests/web/controllers/test_metrics.py b/tests/web/controllers/test_metrics.py
index 17506fefe..6ec4ea3a2 100644
--- a/tests/web/controllers/test_metrics.py
+++ b/tests/web/controllers/test_metrics.py
@@ -14,7 +14,7 @@ def test_format_dict_for_prometheus():
     ) == '{a=1,b=2.2,c="3"}'
 
 
-def test_format_dataclass_for_prometheus():
+def test_format_dataclass_for_prometheus() -> None:
 
     @dataclass
     class Simple: