diff --git a/pyproject.toml b/pyproject.toml
index 98ae19e..62ed54c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,6 +75,7 @@ doc  = ["click",
         "nbformat",
         "nbsphinx",
         "numpydoc",
+        "piqtree2",
         "pandas",
         "plotly",
         "requests",
diff --git a/src/diverse_seq/__init__.py b/src/diverse_seq/__init__.py
index efb5c96..f75f3bc 100644
--- a/src/diverse_seq/__init__.py
+++ b/src/diverse_seq/__init__.py
@@ -4,4 +4,4 @@
 # found by h5py
 import hdf5plugin  # noqa
 
-__version__ = "2024.11.8a1"
+__version__ = "2024.11.8a2"