diff --git a/telegrinder/model.py b/telegrinder/model.py
index 9afc832..ff1ec93 100755
--- a/telegrinder/model.py
+++ b/telegrinder/model.py
@@ -79,7 +79,7 @@ class DataConverter:
     def __repr__(self) -> str:
         return "<{}: {}>".format(
             self.__class__.__name__,
-            ", ".join(f"{k}={v!r}" for k, v in self.converters),
+            ", ".join(f"{k}={v.__name__!r}" for k, v in self.converters.items()),
         )
 
     @property
diff --git a/telegrinder/types/objects.py b/telegrinder/types/objects.py
index 6c2272d..11f4c70 100644
--- a/telegrinder/types/objects.py
+++ b/telegrinder/types/objects.py
@@ -1,6 +1,6 @@
 import typing
 
-from fntypes.co import Some, Variative
+from fntypes.co import Variative
 
 from telegrinder.model import Model
 from telegrinder.msgspec_utils import Nothing, Option, datetime
@@ -5518,7 +5518,7 @@ class RevenueWithdrawalStatePending(RevenueWithdrawalState):
     The withdrawal is in progress.
     """
 
-    type: str
+    type: typing.Literal["pending"]
     """Type of the state, always `pending`."""
 
 
@@ -5528,7 +5528,7 @@ class RevenueWithdrawalStateSucceeded(RevenueWithdrawalState):
     The withdrawal succeeded.
     """
 
-    type: str
+    type: typing.Literal["succeeded"]
     """Type of the state, always `succeeded`."""
 
     date: datetime
@@ -5544,7 +5544,7 @@ class RevenueWithdrawalStateFailed(RevenueWithdrawalState):
     The withdrawal failed and the transaction was refunded.
     """
 
-    type: str
+    type: typing.Literal["failed"]
     """Type of the state, always `failed`."""
 
 
@@ -5554,7 +5554,7 @@ class TransactionPartnerFragment(TransactionPartner):
     Describes a withdrawal transaction with Fragment.
     """
 
-    type: str
+    type: typing.Literal["fragment"]
     """Type of the transaction partner, always `fragment`."""
 
     withdrawal_state: Option[
@@ -5571,7 +5571,7 @@ class TransactionPartnerUser(TransactionPartner):
     Describes a transaction with a user.
     """
 
-    type: str
+    type: typing.Literal["user"]
     """Type of the transaction partner, always `user`."""
 
     user: "User"
@@ -5584,7 +5584,7 @@ class TransactionPartnerOther(TransactionPartner):
     Describes a transaction with an unknown source or recipient.
     """
 
-    type: str
+    type: typing.Literal["other"]
     """Type of the transaction partner, always `other`."""
 
 
diff --git a/typegen/config_literal_types.json b/typegen/config_literal_types.json
index 3d7c31a..4331d67 100755
--- a/typegen/config_literal_types.json
+++ b/typegen/config_literal_types.json
@@ -239,6 +239,72 @@
                 }
             ]
         },
+        {
+            "name": "RevenueWithdrawalStatePending",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "pending"
+                    ]
+                }
+            ]
+        },
+        {
+            "name": "RevenueWithdrawalStateSucceeded",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "succeeded"
+                    ]
+                }
+            ]
+        },
+        {
+            "name": "RevenueWithdrawalStateFailed",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "failed"
+                    ]
+                }
+            ]
+        },
+        {
+            "name": "TransactionPartnerFragment",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "fragment"
+                    ]
+                }
+            ]
+        },
+        {
+            "name": "TransactionPartnerUser",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "user"
+                    ]
+                }
+            ]
+        },
+        {
+            "name": "TransactionPartnerOther",
+            "fields": [
+                {
+                    "name": "type",
+                    "literals": [
+                        "other"
+                    ]
+                }
+            ]
+        },
         {
             "name": "EncryptedPassportElement",
             "fields": [
diff --git a/typegen/nicifications.py b/typegen/nicifications.py
index d728f6a..d785213 100755
--- a/typegen/nicifications.py
+++ b/typegen/nicifications.py
@@ -145,26 +145,20 @@ def full_name(self) -> str:
 
 class _Update(Update):
     def __eq__(self, other: typing.Any) -> bool:
-        return (
-            isinstance(other, self.__class__)
-            and self.update_type.map(
-                lambda x: x == other.update_type.unwrap_or_none(),
-            ).unwrap_or(False)
-        )
+        return isinstance(other, self.__class__) and self.update_type == other.update_type
 
     @property
-    def update_type(self) -> Option[UpdateType]:
+    def update_type(self) -> UpdateType:
         """Incoming update type."""
 
-        if update := next(
-            filter(
-                lambda x: bool(x[1]),
-                self.to_dict(exclude_fields={"update_id"}).items(),
-            ),
-            None,
-        ):
-            return Some(UpdateType(update[0]))
-        return Nothing
+        return UpdateType(
+            next(
+                filter(
+                    lambda x: bool(x[1]),
+                    self.to_dict(exclude_fields={"update_id"}).items(),
+                ),
+            )[0],
+        )
 
 
 class _InputFile(typing.NamedTuple):