diff --git a/stubs/xmltodict/@tests/test_cases/check_namespaces.py b/stubs/xmltodict/@tests/test_cases/check_namespaces.py
new file mode 100644
index 000000000000..e58eda2bbea3
--- /dev/null
+++ b/stubs/xmltodict/@tests/test_cases/check_namespaces.py
@@ -0,0 +1,6 @@
+from __future__ import annotations
+
+import xmltodict
+
+ns: dict[str, None] = {"http://example.com/": None}
+xmltodict.parse("<a/>", namespaces=ns)
diff --git a/stubs/xmltodict/xmltodict.pyi b/stubs/xmltodict/xmltodict.pyi
index 654c1ccc5860..937db619e499 100644
--- a/stubs/xmltodict/xmltodict.pyi
+++ b/stubs/xmltodict/xmltodict.pyi
@@ -25,7 +25,7 @@ class _DictSAXHandler:
     dict_constructor: type
     strip_whitespace: bool
     namespace_separator: str
-    namespaces: dict[str, str] | None
+    namespaces: Mapping[str, str | None] | None
     namespace_declarations: dict[str, str]
     force_list: bool | Container[str] | Callable[[tuple[str, _AttrDict | None], str, str], bool] | None
     comment_key: str
@@ -42,7 +42,7 @@ class _DictSAXHandler:
         dict_constructor: type = ...,
         strip_whitespace: bool = True,
         namespace_separator: str = ":",
-        namespaces: dict[str, str] | None = None,
+        namespaces: Mapping[str, str | None] | None = None,
         force_list: bool | Container[str] | Callable[[tuple[str, _AttrDict | None], str, str], bool] | None = None,
         comment_key: str = "#comment",
     ) -> None: ...
@@ -72,7 +72,7 @@ def parse(
     postprocessor: Callable[[list[tuple[str, _AttrDict | None]], str, _AttrValue], tuple[str, _AttrValue]] | None = None,
     dict_constructor: type = ...,
     strip_whitespace: bool = True,
-    namespaces: dict[str, str] | None = None,
+    namespaces: Mapping[str, str | None] | None = None,
     force_list: bool | Container[str] | Callable[[tuple[str, _AttrDict | None], str, str], bool] | None = None,
     comment_key: str = "#comment",
 ) -> dict[str, Any]: ...
@@ -95,7 +95,7 @@ def unparse(
     newl: str = "\n",
     indent: str | int = "\t",
     namespace_separator: str = ":",
-    namespaces: Mapping[str, str] | None = None,
+    namespaces: Mapping[str, str | None] | None = None,
     expand_iter: str | None = None,
 ) -> None: ...
 @overload
@@ -117,6 +117,6 @@ def unparse(
     newl: str = "\n",
     indent: str | int = "\t",
     namespace_separator: str = ":",
-    namespaces: Mapping[str, str] | None = None,
+    namespaces: Mapping[str, str | None] | None = None,
     expand_iter: str | None = None,
 ) -> str: ...