diff --git a/ci/requirements/doc.yml b/ci/requirements/doc.yml
index d0484c5e999..c453aa32efc 100644
--- a/ci/requirements/doc.yml
+++ b/ci/requirements/doc.yml
@@ -11,6 +11,7 @@ dependencies:
   - kerchunk
   - dask-core>=2022.1
   - dask-expr
+  - flox
   - hypothesis>=6.75.8
   - h5netcdf>=0.13
   - ipykernel