diff --git a/README.md b/README.md
index cc5a9423..5483d7b6 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,9 @@ SPDX-License-Identifier: Apache-2.0
     - [CI](#ci)
     - [CD](#cd)
   - [License](#license)
+  - [Contributing](#contributing)
+  - [Contact](#contact)
+  - [Attribution](#attribution)
 
 Python dataclasses for CGMES 3 + RDF schema description + SHACL (validation) files.
 
diff --git a/pycgmes/utils/base.py b/pycgmes/utils/base.py
index ddd480ea..c2a65eea 100644
--- a/pycgmes/utils/base.py
+++ b/pycgmes/utils/base.py
@@ -165,6 +165,6 @@ class CgmesAttribute(TypedDict):
 
     # Actual value
     value: CgmesAttributeTypes
-    # The default will be None. Only custom attributes might have something different, given as metadata.
+    # Custom attributes might have something different, given as metadata.
     # See readme for more information.
-    namespace: str | None
+    namespace: str
diff --git a/pyproject.toml b/pyproject.toml
index 2d86211e..ca21d8c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@
 
 [tool.poetry]
 name = "pycgmes"
-version = "2.0.1"
+version = "2.0.2"
 description = "Python dataclasses for CGMES 3.0.0"
 authors = ["pycgmes <pycgmes@alliander.com>"]
 readme = "README.md"