diff --git a/README.md b/README.md
index 73983e4..a7371d1 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
+
+## NOTE: Experimental branch
+
+This branch is an experimental branch for implementing the recommendations of the IVOA P3T group. It is not yet ready or recommended for general use.
+
 # vo-models
 
 `vo-models` is an open-source project to provide Python models for [IVOA](https://www.ivoa.net/) service protocols.
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 32e895b..8ae3179 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -20,7 +20,7 @@
 project = PYPROJECT["name"]
 release = PYPROJECT["version"]
 author = f"{PYPROJECT['authors'][0]['name']} <{PYPROJECT['authors'][0]['email']}>"
-copyright = "2023, Joshua Fraustro"
+copyright = "2024, Joshua Fraustro"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/environment.yml b/environment.yml
index 34f0672..59b15c7 100644
--- a/environment.yml
+++ b/environment.yml
@@ -3,7 +3,7 @@ channels:
   - defaults
   - conda-forge
 dependencies:
-  - python>=3.10,<3.11
+  - python>=3.11,<3.12
   - pip
   - wheel
   - pip:
diff --git a/pyproject.toml b/pyproject.toml
index ee1f896..65f8d4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ authors = [
 ]
 description = "Pydantic data models for IVOA protocols"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 
 dependencies = [
     "pydantic-xml[lxml]>=2.6.0",