diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 252984f..3ffde17 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+2.14.3 (2025-03-11)
+-------------------
+
+- reserved namespaces registration skipped.
+
+
 2.14.2 (2025-02-24)
 -------------------
 
diff --git a/pydantic_xml/utils.py b/pydantic_xml/utils.py
index 0b137b3..0553e6a 100644
--- a/pydantic_xml/utils.py
+++ b/pydantic_xml/utils.py
@@ -81,7 +81,7 @@ def register_nsmap(nsmap: NsMap) -> None:
     """
 
     for prefix, uri in nsmap.items():
-        if prefix != '':  # skip default namespace
+        if prefix != '' and not re.match(r"ns\d+$", prefix):  # skip default namespace and reserved ones
             etree.register_namespace(prefix, uri)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index b639aee..b7e8636 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pydantic-xml"
-version = "2.14.2"
+version = "2.14.3"
 description = "pydantic xml extension"
 authors = ["Dmitry Pershin <dapper1291@gmail.com>"]
 license = "Unlicense"