diff --git a/graphicle/data.py b/graphicle/data.py
index fdf0a9c..eb7399f 100644
--- a/graphicle/data.py
+++ b/graphicle/data.py
@@ -1344,6 +1344,8 @@ def from_spherical_uniform(
         """Returns a ``MomentumArray`` whose elements are sampled from
         uniform distributions of energy and 3-momentum.
 
+        .. versionadded:: 0.4.0
+
         Parameters
         ----------
         size : int