diff --git a/reflex/page.py b/reflex/page.py
index 8cc031757..06eadb184 100644
--- a/reflex/page.py
+++ b/reflex/page.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from collections import defaultdict
-from typing import Any, Dict, List
+from typing import Any, Callable, Dict, List
 
 from reflex.config import get_config
 from reflex.event import BASE_STATE, EventType
@@ -42,7 +42,7 @@ def page(
         The decorated function.
     """
 
-    def decorator(render_fn):
+    def decorator(render_fn: Callable):
         kwargs = {}
         if route:
             kwargs["route"] = route
@@ -66,7 +66,7 @@ def page(
     return decorator
 
 
-def get_decorated_pages(omit_implicit_routes=True) -> list[dict[str, Any]]:
+def get_decorated_pages(omit_implicit_routes: bool = True) -> list[dict[str, Any]]:
     """Get the decorated pages.
 
     Args:
diff --git a/reflex/route.py b/reflex/route.py
index 0b7172824..3f49f66e9 100644
--- a/reflex/route.py
+++ b/reflex/route.py
@@ -103,7 +103,7 @@ def catchall_prefix(route: str) -> str:
     return route.replace(pattern, "") if pattern else ""
 
 
-def replace_brackets_with_keywords(input_string):
+def replace_brackets_with_keywords(input_string: str) -> str:
     """Replace brackets and everything inside it in a string with a keyword.
 
     Args:
diff --git a/reflex/style.py b/reflex/style.py
index f0ee8c6a7..f2923fa38 100644
--- a/reflex/style.py
+++ b/reflex/style.py
@@ -185,7 +185,9 @@ def convert(
     var_data = None  # Track import/hook data from any Vars in the style dict.
     out = {}
 
-    def update_out_dict(return_value, keys_to_update):
+    def update_out_dict(
+        return_value: Var | dict | list | str, keys_to_update: tuple[str, ...]
+    ):
         for k in keys_to_update:
             out[k] = return_value
 
diff --git a/reflex/testing.py b/reflex/testing.py
index 9ddb03504..a7f3f73a8 100644
--- a/reflex/testing.py
+++ b/reflex/testing.py
@@ -89,7 +89,7 @@ else:
 class chdir(contextlib.AbstractContextManager):
     """Non thread-safe context manager to change the current working directory."""
 
-    def __init__(self, path):
+    def __init__(self, path: str | pathlib.Path):
         """Prepare contextmanager.
 
         Args:
@@ -321,7 +321,7 @@ class AppHarness:
 
         return _shutdown_redis
 
-    def _start_backend(self, port=0):
+    def _start_backend(self, port: int = 0):
         if self.app_instance is None:
             raise RuntimeError("App was not initialized.")
         self.backend = uvicorn.Server(
@@ -425,7 +425,7 @@ class AppHarness:
         return self
 
     @staticmethod
-    def get_app_global_source(key, value):
+    def get_app_global_source(key: str, value: Any):
         """Get the source code of a global object.
         If value is a function or class we render the actual
         source of value otherwise we assign value to key.