diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2c4ae7..c05ceb3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Python JSONPath Change Log
 
+## Version 1.2.3
+
+**Fixes**
+
+- Relax type hints on `JSONPatch.apply()`. Some static type checkers were complaining.
+
 ## Version 1.2.2
 
 **Fixes**
diff --git a/jsonpath/__about__.py b/jsonpath/__about__.py
index 433a7d9..a0a9afb 100644
--- a/jsonpath/__about__.py
+++ b/jsonpath/__about__.py
@@ -1,4 +1,4 @@
 # SPDX-FileCopyrightText: 2023-present James Prior <jamesgr.prior@gmail.com>
 #
 # SPDX-License-Identifier: MIT
-__version__ = "1.2.2"
+__version__ = "1.2.3"
diff --git a/jsonpath/exceptions.py b/jsonpath/exceptions.py
index 7e61acb..f3556a9 100644
--- a/jsonpath/exceptions.py
+++ b/jsonpath/exceptions.py
@@ -1,4 +1,5 @@
 """JSONPath exceptions."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/jsonpath/patch.py b/jsonpath/patch.py
index ce5c054..bd2972d 100644
--- a/jsonpath/patch.py
+++ b/jsonpath/patch.py
@@ -7,6 +7,7 @@
 from abc import ABC
 from abc import abstractmethod
 from io import IOBase
+from typing import Any
 from typing import Dict
 from typing import Iterable
 from typing import List
@@ -74,7 +75,7 @@ def apply(
             else:
                 parent.insert(int(target), self.value)
         elif isinstance(parent, MutableMapping):
-            parent[target] = self.value
+            parent[str(target)] = self.value
         else:
             raise JSONPatchError(
                 f"unexpected operation on {parent.__class__.__name__!r}"
@@ -183,7 +184,7 @@ def apply(
         elif isinstance(parent, MutableMapping):
             if obj is UNDEFINED:
                 raise JSONPatchError("can't remove nonexistent property")
-            del parent[self.path.parts[-1]]
+            del parent[str(self.path.parts[-1])]
         else:
             raise JSONPatchError(
                 f"unexpected operation on {parent.__class__.__name__!r}"
@@ -221,7 +222,7 @@ def apply(
         elif isinstance(parent, MutableMapping):
             if obj is UNDEFINED:
                 raise JSONPatchError("can't replace nonexistent property")
-            parent[self.path.parts[-1]] = self.value
+            parent[str(self.path.parts[-1])] = self.value
         else:
             raise JSONPatchError(
                 f"unexpected operation on {parent.__class__.__name__!r}"
@@ -259,7 +260,7 @@ def apply(
         if isinstance(source_parent, MutableSequence):
             del source_parent[int(self.source.parts[-1])]
         if isinstance(source_parent, MutableMapping):
-            del source_parent[self.source.parts[-1]]
+            del source_parent[str(self.source.parts[-1])]
 
         dest_parent, _ = self.dest.resolve_parent(data)
 
@@ -270,7 +271,7 @@ def apply(
         if isinstance(dest_parent, MutableSequence):
             dest_parent.insert(int(self.dest.parts[-1]), source_obj)
         elif isinstance(dest_parent, MutableMapping):
-            dest_parent[self.dest.parts[-1]] = source_obj
+            dest_parent[str(self.dest.parts[-1])] = source_obj
         else:
             raise JSONPatchError(
                 f"unexpected operation on {dest_parent.__class__.__name__!r}"
@@ -312,7 +313,7 @@ def apply(
         if isinstance(dest_parent, MutableSequence):
             dest_parent.insert(int(self.dest.parts[-1]), copy.deepcopy(source_obj))
         elif isinstance(dest_parent, MutableMapping):
-            dest_parent[self.dest.parts[-1]] = copy.deepcopy(source_obj)
+            dest_parent[str(self.dest.parts[-1])] = copy.deepcopy(source_obj)
         else:
             raise JSONPatchError(
                 f"unexpected operation on {dest_parent.__class__.__name__!r}"
@@ -628,7 +629,7 @@ def test(self: Self, path: Union[str, JSONPointer], value: object) -> Self:
 
     def apply(
         self,
-        data: Union[str, IOBase, MutableSequence[object], MutableMapping[str, object]],
+        data: Union[str, IOBase, MutableSequence[object], MutableMapping[str, Any]],
     ) -> object:
         """Apply all operations from this patch to _data_.
 
@@ -676,7 +677,7 @@ def asdicts(self) -> List[Dict[str, object]]:
 
 def apply(
     patch: Union[str, IOBase, Iterable[Mapping[str, object]], None],
-    data: Union[str, IOBase, MutableSequence[object], MutableMapping[str, object]],
+    data: Union[str, IOBase, MutableSequence[object], MutableMapping[str, Any]],
     *,
     unicode_escape: bool = True,
     uri_decode: bool = False,