diff --git a/docs/source/api.rst b/docs/source/api.rst
index 58ae1fd280f0d074a5f79871b9fc2ea0a1b1a288..20d13c173ce25bcfe51ec480f14519e907e27fa9 100644
--- a/docs/source/api.rst
+++ b/docs/source/api.rst
@@ -3,6 +3,9 @@ tree_maker API documentation
 
 tag.py
 ------
+.. automodule:: tree_maker.tag
+    :members:
+|
 .. autofunction:: tree_maker.tag.read_yaml
 |
 .. autofunction:: tree_maker.tag.write_yaml