diff --git a/pyproject.toml b/pyproject.toml
index b2887eb4..db9c194d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,6 +48,7 @@ docs = [
     "jupytext",
     "ipykernel",
     "myst_nb",
+    "funlib.persistence",
 ]
 
 # # module specific overrides