diff --git a/poetry.lock b/poetry.lock
index 2edcaf271..e543471c1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
 
 [[package]]
 name = "alembic"
@@ -1842,13 +1842,13 @@ files = [
 
 [[package]]
 name = "pyright"
-version = "1.1.334"
+version = "1.1.378"
 description = "Command line wrapper for pyright"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pyright-1.1.334-py3-none-any.whl", hash = "sha256:dcb13e8358e021189672c4d6ebcad192ab061e4c7225036973ec493183c6da68"},
-    {file = "pyright-1.1.334.tar.gz", hash = "sha256:3adaf10f1f4209575dc022f9c897f7ef024639b7ea5b3cbe49302147e6949cd4"},
+    {file = "pyright-1.1.378-py3-none-any.whl", hash = "sha256:8853776138b01bc284da07ac481235be7cc89d3176b073d2dba73636cb95be79"},
+    {file = "pyright-1.1.378.tar.gz", hash = "sha256:78a043be2876d12d0af101d667e92c7734f3ebb9db71dccc2c220e7e7eb89ca2"},
 ]
 
 [package.dependencies]
@@ -3179,4 +3179,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "c5d4fa9102c7fd39a6300628d22ca67cbf013e6d580eab43723b5b9ee02a57b8"
+content-hash = "9d77c059894e360c1bc0f5f12bcacab5cd6b86e3ceaf835ba55937218388446d"
diff --git a/pyproject.toml b/pyproject.toml
index 8b9659996..62a5fa31d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ reflex-chakra = ">=0.6.0a"
 [tool.poetry.group.dev.dependencies]
 pytest = ">=7.1.2,<8.0"
 pytest-mock = ">=3.10.0,<4.0"
-pyright = ">=1.1.229,<1.1.335"
+pyright = ">=1.1.229"
 darglint = ">=1.8.1,<2.0"
 toml = ">=0.10.2,<1.0"
 pytest-asyncio = ">=0.20.1,<0.22.0" # https://github.com/pytest-dev/pytest-asyncio/issues/706
diff --git a/reflex/base.py b/reflex/base.py
index 5a2a6d2a9..02acdf8f8 100644
--- a/reflex/base.py
+++ b/reflex/base.py
@@ -3,17 +3,16 @@
 from __future__ import annotations
 
 import os
-from typing import TYPE_CHECKING, Any, List, Type
+from typing import Any, List, Type
 
 try:
     import pydantic.v1.main as pydantic_main
     from pydantic.v1 import BaseModel
     from pydantic.v1.fields import ModelField
 except ModuleNotFoundError:
-    if not TYPE_CHECKING:
-        import pydantic.main as pydantic_main
-        from pydantic import BaseModel
-        from pydantic.fields import ModelField  # type: ignore
+    import pydantic.main as pydantic_main
+    from pydantic import BaseModel
+    from pydantic.fields import ModelField  # type: ignore
 
 
 from reflex import constants
@@ -48,7 +47,7 @@ def validate_field_name(bases: List[Type["BaseModel"]], field_name: str) -> None
 pydantic_main.validate_field_name = validate_field_name  # type: ignore
 
 
-class Base(BaseModel):  # pyright: ignore [reportUnboundVariable]
+class Base(BaseModel):  # pyright: ignore [reportGeneralTypeIssues]
     """The base class subclassed by all Reflex classes.
 
     This class wraps Pydantic and provides common methods such as
@@ -65,7 +64,7 @@ class Base(BaseModel):  # pyright: ignore [reportUnboundVariable]
         use_enum_values = True
         extra = "allow"
 
-    def json(self) -> str:
+    def json(self) -> str:  # pyright: ignore [reportIncompatibleMethodOverride]
         """Convert the object to a json string.
 
         Returns:
diff --git a/reflex/config.py b/reflex/config.py
index 06d8c2193..468c5f1f5 100644
--- a/reflex/config.py
+++ b/reflex/config.py
@@ -149,7 +149,7 @@ class Config(Base):
     See the [configuration](https://reflex.dev/docs/getting-started/configuration/) docs for more info.
     """
 
-    class Config:
+    class Config:  # type: ignore
         """Pydantic config for the config."""
 
         validate_assignment = True
diff --git a/reflex/event.py b/reflex/event.py
index 6d0577c6f..5f3f71327 100644
--- a/reflex/event.py
+++ b/reflex/event.py
@@ -144,7 +144,7 @@ class EventHandler(EventActionsMixin):
     # Empty string means this event handler is a server side event.
     state_full_name: str = ""
 
-    class Config:
+    class Config:  # type: ignore
         """The Pydantic config."""
 
         # Needed to allow serialization of Callable.
@@ -229,7 +229,7 @@ class EventSpec(EventActionsMixin):
     # The arguments to pass to the function.
     args: Tuple[Tuple[Var, Var], ...] = ()
 
-    class Config:
+    class Config:  # type: ignore
         """The Pydantic config."""
 
         # Required to allow tuple fields.
@@ -363,7 +363,9 @@ class FileUpload(Base):
     on_upload_progress: Optional[Union[EventHandler, Callable]] = None
 
     @staticmethod
-    def on_upload_progress_args_spec(_prog: Dict[str, Union[int, float, bool]]):
+    def on_upload_progress_args_spec(
+        _prog: Var[Dict[str, Union[int, float, bool]]],
+    ) -> list[Var]:
         """Args spec for on_upload_progress event handler.
 
         Returns:
@@ -463,7 +465,7 @@ def server_side(name: str, sig: inspect.Signature, **kwargs) -> EventSpec:
         return None
 
     fn.__qualname__ = name
-    fn.__signature__ = sig
+    fn.__signature__ = sig  # pyright: ignore [reportFunctionMemberAccess]
     return EventSpec(
         handler=EventHandler(fn=fn),
         args=tuple(
diff --git a/reflex/utils/types.py b/reflex/utils/types.py
index 6c21aa679..52fd56a5f 100644
--- a/reflex/utils/types.py
+++ b/reflex/utils/types.py
@@ -95,8 +95,9 @@ PrimitiveType = Union[int, float, bool, str, list, dict, set, tuple]
 StateVar = Union[PrimitiveType, Base, None]
 StateIterVar = Union[list, set, tuple]
 
-# ArgsSpec = Callable[[Var], list[Var]]
-ArgsSpec = Callable
+
+# Type for signatures mapping JS function args to Python function args.
+ArgsSpec = Callable[..., List]
 
 
 PrimitiveToAnnotation = {