diff --git a/bridge_indexer/handlers/rollup_message.py b/bridge_indexer/handlers/rollup_message.py
index ff07389..349ae6b 100644
--- a/bridge_indexer/handlers/rollup_message.py
+++ b/bridge_indexer/handlers/rollup_message.py
@@ -353,9 +353,8 @@ async def from_transaction(self) -> str:
 
     @staticmethod
     def _hash_from_dto(dto) -> str:
-        parameters_hash = uuid5(NAMESPACE_OID, orjson.dumps(dto, option=orjson.OPT_SORT_KEYS)).hex
+        return uuid5(NAMESPACE_OID, orjson.dumps(dto, option=orjson.OPT_SORT_KEYS)).hex
 
-        return parameters_hash
 
 
 class ComparableDTO(BaseModel):
@@ -457,6 +456,5 @@ async def _from_fa_event(self) -> str:
 
     @staticmethod
     def _hash_from_dto(dto: ComparableDTO) -> str:
-        parameters_hash = uuid5(NAMESPACE_OID, orjson.dumps(dto.model_dump(), option=orjson.OPT_SORT_KEYS)).hex
+        return uuid5(NAMESPACE_OID, orjson.dumps(dto.model_dump(), option=orjson.OPT_SORT_KEYS)).hex
 
-        return parameters_hash
diff --git a/bridge_indexer/handlers/service_container.py b/bridge_indexer/handlers/service_container.py
index 8ffc415..e8c54c5 100644
--- a/bridge_indexer/handlers/service_container.py
+++ b/bridge_indexer/handlers/service_container.py
@@ -1,5 +1,6 @@
+from typing import TYPE_CHECKING
+
 from dipdup.context import DipDupContext
-from dipdup.datasources.http import HttpDatasource
 from dipdup.datasources.tezos_tzkt import TezosTzktDatasource
 from dipdup.datasources.tzip_metadata import TzipMetadataDatasource
 from pydantic import BaseModel
@@ -10,6 +11,9 @@
 from bridge_indexer.handlers.rollup_message import RollupMessageIndex
 from bridge_indexer.handlers.ticket import TicketService
 
+if TYPE_CHECKING:
+    from dipdup.datasources.http import HttpDatasource
+
 
 class BridgeConstantStorage(BaseSettings):
     smart_rollup_address: str = Field(alias='SMART_ROLLUP_ADDRESS')
diff --git a/bridge_indexer/handlers/tezos/on_head.py b/bridge_indexer/handlers/tezos/on_head.py
index 3c9ac73..cf331cf 100644
--- a/bridge_indexer/handlers/tezos/on_head.py
+++ b/bridge_indexer/handlers/tezos/on_head.py
@@ -1,7 +1,10 @@
+from typing import TYPE_CHECKING
+
 from dipdup.context import HandlerContext
 from dipdup.models.tezos import TezosHeadBlockData
 
-from bridge_indexer.handlers.rollup_message import RollupMessageIndex
+if TYPE_CHECKING:
+    from bridge_indexer.handlers.rollup_message import RollupMessageIndex
 
 
 async def on_head(
diff --git a/bridge_indexer/types/kernel/evm_events/deposit.py b/bridge_indexer/types/kernel/evm_events/deposit.py
index 0792216..c7edaad 100644
--- a/bridge_indexer/types/kernel/evm_events/deposit.py
+++ b/bridge_indexer/types/kernel/evm_events/deposit.py
@@ -2,14 +2,15 @@
 
 from __future__ import annotations
 
+from typing import Literal
+
 from pydantic import BaseModel
-from pydantic import ConfigDict
 
 
 class DepositPayload(BaseModel):
-    model_config: ConfigDict = ConfigDict(
-        extra='forbid',
-    )
+    class Config:
+        forbid: Literal['forbid'] = 'forbid'
+
     ticket_hash: int
     ticket_owner: str
     receiver: str
diff --git a/bridge_indexer/types/kernel/evm_events/withdrawal.py b/bridge_indexer/types/kernel/evm_events/withdrawal.py
index 9757aaa..f93c003 100644
--- a/bridge_indexer/types/kernel/evm_events/withdrawal.py
+++ b/bridge_indexer/types/kernel/evm_events/withdrawal.py
@@ -2,16 +2,19 @@
 
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+from typing import Literal
+
 from pydantic import BaseModel
-from pydantic import ConfigDict
 
-from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
+if TYPE_CHECKING:
+    from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
 
 
 class WithdrawalPayload(BaseModel):
-    model_config: ConfigDict = ConfigDict(
-        extra='forbid',
-    )
+    class Config:
+        forbid: Literal['forbid'] = 'forbid'
+
     ticket_hash: int
     sender: str
     ticket_owner: str
diff --git a/bridge_indexer/types/kernel_native/evm_events/withdrawal.py b/bridge_indexer/types/kernel_native/evm_events/withdrawal.py
index 86d56fb..a00ea5d 100644
--- a/bridge_indexer/types/kernel_native/evm_events/withdrawal.py
+++ b/bridge_indexer/types/kernel_native/evm_events/withdrawal.py
@@ -2,16 +2,19 @@
 
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+from typing import Literal
+
 from pydantic import BaseModel
-from pydantic import ConfigDict
 
-from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
+if TYPE_CHECKING:
+    from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
 
 
 class WithdrawalPayload(BaseModel):
-    model_config: ConfigDict = ConfigDict(
-        extra='forbid',
-    )
+    class Config:
+        forbid: Literal['forbid'] = 'forbid'
+
     amount: int
     sender: str
     receiver: ForgedTezosAccount
diff --git a/bridge_indexer/types/output_proof/micheline_expression.py b/bridge_indexer/types/output_proof/micheline_expression.py
index 7e24880..dcbb4f5 100644
--- a/bridge_indexer/types/output_proof/micheline_expression.py
+++ b/bridge_indexer/types/output_proof/micheline_expression.py
@@ -121,7 +121,7 @@ def unpack(self):
             if is_positive is None:
                 sign_bit, bits = bits[0], bits[1:]
                 is_positive = sign_bit == '0'
-            bits_array = [bits] + bits_array
+            bits_array = [bits, *bits_array]
             if leading_bit == '0':
                 break
 
diff --git a/bridge_indexer/types/ticketer/tezos_parameters/withdraw.py b/bridge_indexer/types/ticketer/tezos_parameters/withdraw.py
index 8e3758e..984061e 100644
--- a/bridge_indexer/types/ticketer/tezos_parameters/withdraw.py
+++ b/bridge_indexer/types/ticketer/tezos_parameters/withdraw.py
@@ -3,16 +3,18 @@
 
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
 from typing import Literal
 
 from pydantic import BaseModel
 
-from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
+if TYPE_CHECKING:
+    from bridge_indexer.types.tezos.forged_tezos_account import ForgedTezosAccount
 
 
 class TicketContent(BaseModel):
     class Config:
-        forbid: Literal[forbid] = 'forbid'
+        forbid: Literal['forbid'] = 'forbid'
 
     ticket_id: int
     metadata: bytes | None
@@ -20,7 +22,7 @@ class Config:
 
 class Ticket(BaseModel):
     class Config:
-        forbid: Literal[forbid] = 'forbid'
+        forbid: Literal['forbid'] = 'forbid'
 
     ticketer: ForgedTezosAccount
     content: TicketContent
@@ -29,7 +31,7 @@ class Config:
 
 class WithdrawParameter(BaseModel):
     class Config:
-        forbid: Literal[forbid] = 'forbid'
+        forbid: Literal['forbid'] = 'forbid'
 
     receiver: ForgedTezosAccount
     ticket: Ticket