diff --git a/.readthedocs.yml b/.readthedocs.yaml
similarity index 100%
rename from .readthedocs.yml
rename to .readthedocs.yaml
diff --git a/pyproject.toml b/pyproject.toml
index 2a1d43bd..0dd85221 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ sphinxcontrib-programoutput = { version = '*', optional = true }
 [tool.poetry.extras]
 testing = ['pooch', 'pytest', 'pytest-cov', 'pytest-socket', 'pytest-xdist', 'wget']
 development = ['isort', 'oitnb']
-documentation = ['m2r2', 'sphinx', 'sphinx-rtd-theme', 'sphinxcontrib-programoutput']
+documentation = ['dunamai', 'm2r2', 'sphinx', 'sphinx-rtd-theme', 'sphinxcontrib-programoutput']
 
 [tool.poetry.scripts]
 initialize_adcirc = 'coupledmodeldriver.client.initialize_adcirc:main'