diff --git a/docs/api.rst b/docs/api.rst
index afbbfe5..2d8ceb7 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -5,15 +5,16 @@ tools
 .. autosummary::
    :toctree: modules
 
-   dotplot_2obs
    alpha_code
    calc_centroid
    cell_cycle_scoring
    closest_node
    cmp
    colorRampPalette
+   combine_two_categories
+   dotplot_2obs
    exportDEres
    get_hex
    returnDEres
    vmax
-   vmin
\ No newline at end of file
+   vmin