diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5381155..7e782aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,23 @@
+# v2.1.0
+
+* Add the following czml properties:
+  * `CartographicDegreesListOfListsValue`
+  * `CartographicRadiansListOfListsValue`
+  * `ReferenceListValue`
+  * `ReferenceListOfListsValue`
+  * `Cartesian3ListOfListsValue`
+  * `types.Cartesian3VelocityValue`
+* Change the following czml properties:
+  * `Sequence` -> `TimeIntervalCollection`
+* Fixes:
+  * `Packet.position` can be `Position`, `PositionList` or `PositionListOfLists`
+  * `Material.polylineOutline` can be `PolylineMaterial` or `PolylineOutline`
+* Expand validation
+
+# v2.0.0
+
+* All classes use pydantic
+
 # v0.5.4
 
 * Add several new properties: `ViewFrom`, `Box`, `Corridor`,
diff --git a/README.md b/README.md
index 960e1ab..8772132 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,10 @@
 ![pypi](https://img.shields.io/pypi/v/czml3)
 ![conda](https://img.shields.io/conda/vn/conda-forge/czml3?label=conda)
 ![Python](https://img.shields.io/pypi/pyversions/czml3)
-![codecov](https://img.shields.io/codecov/c/github/poliastro/czml3.svg?style=flat-square)
+[![codecov](https://codecov.io/gh/Stoops-ML/czml3/graph/badge.svg?token=EF8SIL2JBV)](https://codecov.io/gh/Stoops-ML/czml3)
 ![pypi-downloads](https://img.shields.io/pepy/dt/czml3?label=pypi%20downloads)
 ![conda-downloads](https://img.shields.io/conda/dn/conda-forge/czml3?label=conda%20downloads)
-![workflow-status](https://img.shields.io/github/actions/workflow/status/poliastro/czml3/workflow.yml?branch=main)
+![workflow-status](https://img.shields.io/github/actions/workflow/status/Stoops-ML/czml3/workflow.yml?branch=main)
 ![license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)
 
 From the official [CZML Guide](https://github.com/AnalyticalGraphicsInc/czml-writer/wiki/CZML-Guide):
diff --git a/pyproject.toml b/pyproject.toml
index 89871dc..dcdb8b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,6 +103,7 @@ dev = [
     "tox",
     "build",
     "ruff",
+    "numpy",
 ]
 
 [project.urls]