diff --git a/docs/source/dev/formatters.rst b/docs/source/dev/formatters.rst
index 8f90892..0b37abd 100644
--- a/docs/source/dev/formatters.rst
+++ b/docs/source/dev/formatters.rst
@@ -48,3 +48,4 @@ API Documentation
 =================
 
 .. autoclass:: flake8.formatting.base.BaseFormatter
+    :members:
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 4a50a5d..a2bd76a 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -18,8 +18,8 @@ Plugin Developer Guide
 .. toctree::
     :maxdepth: 2
 
-    internal/option_handling
-    internal/plugin_handling
+    dev/formatters
+    dev/registering_plugins
 
 Developer Guide
 ---------------
@@ -27,6 +27,9 @@ Developer Guide
 .. toctree::
     :maxdepth: 2
 
+    internal/option_handling
+    internal/plugin_handling
+    internal/utils
 
 Indices and tables
 ==================
diff --git a/tox.ini b/tox.ini
index 67c9478..8b952f3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,7 +35,7 @@ basepython = python3.4
 skipsdist = true
 skip_install = true
 use_develop = false
-changedir = docs/_build/html
+changedir = docs/build/html
 deps =
 commands =
     python -m http.server {posargs}