diff --git a/doc/api/core.rst b/doc/api/core.rst
index bab89ede0b79f9a151c79cc64509a8171f4d6fc5..044ef8c9d6c9de2923619d92cfddb9a386d94f32 100644
--- a/doc/api/core.rst
+++ b/doc/api/core.rst
@@ -1,18 +1,13 @@
-
 Core library
 ------------
 
-Sub-packages
-~~~~~~~~~~~~
+Sub-packages:
 
 .. toctree::
    :maxdepth: 2
 
    core.protocols
 
-Module members
-~~~~~~~~~~~~~~
-
 .. automodule:: sjrpc.core
    :members:
    :inherited-members:
diff --git a/doc/index.rst b/doc/index.rst
index b0293f92fca9428a03d59693c620bacc49449a06..1ba5cdca5e8324652f97ae91c3f16aed9c9deeec 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -4,7 +4,7 @@ Welcome to sjRpc's documentation!
 Contents:
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 3
 
    fundamentals
    examples
diff --git a/sjrpc/core/__init__.py b/sjrpc/core/__init__.py
index 2ac7cbb0fcbc45998a21d47f02927e77a764ad22..bcddb07b3642faf0d790115bf31639ed38c26baf 100644
--- a/sjrpc/core/__init__.py
+++ b/sjrpc/core/__init__.py
@@ -15,11 +15,6 @@ This packages export following function/classes:
 
 It also contains a sub-package containing protocols: :mod:`core.protocols`.
 
-.. toctree::
-   :hidden:
-
-   core.protocols
-
 '''
 
 from sjrpc.core.rpcconnection import *