diff --git a/doc/source/patterns.rst b/doc/source/patterns.rst
index 4b6ff832c..8c8eb410e 100644
--- a/doc/source/patterns.rst
+++ b/doc/source/patterns.rst
@@ -21,3 +21,13 @@ Graph flow
 ~~~~~~~~~~
 
 .. automodule:: taskflow.patterns.graph_flow
+
+Hierarchy
+~~~~~~~~~
+
+.. inheritance-diagram::
+    taskflow.flow
+    taskflow.patterns.linear_flow
+    taskflow.patterns.unordered_flow
+    taskflow.patterns.graph_flow
+    :parts: 2
diff --git a/doc/source/persistence.rst b/doc/source/persistence.rst
index 6065e4f46..8cfe91d1b 100644
--- a/doc/source/persistence.rst
+++ b/doc/source/persistence.rst
@@ -198,4 +198,4 @@ Hierarchy
     taskflow.persistence.backends.impl_zookeeper
     taskflow.persistence.backends.impl_dir
     taskflow.persistence.backends.impl_sqlalchemy
-    :parts: 1
+    :parts: 2