add more docs
diff --git a/docs/easter.rst b/docs/easter.rst
index 1570ae1..13b5903 100644
--- a/docs/easter.rst
+++ b/docs/easter.rst
@@ -1,6 +1,6 @@
-=====
+======
 easter
-=====
+======
 .. automodule:: dateutil.easter
    :members:
    :undoc-members:
diff --git a/docs/parser.rst b/docs/parser.rst
index 936fdf8..c579974 100644
--- a/docs/parser.rst
+++ b/docs/parser.rst
@@ -1,6 +1,6 @@
-=====
+======
 parser
-=====
+======
 .. automodule:: dateutil.parser
    :members:
    :undoc-members:
diff --git a/docs/relativedelta.rst b/docs/relativedelta.rst
index 3db8d58..23c52c7 100644
--- a/docs/relativedelta.rst
+++ b/docs/relativedelta.rst
@@ -1,6 +1,6 @@
-=====
+=============
 relativedelta
-=====
+=============
 .. automodule:: dateutil.relativedelta
    :members:
    :undoc-members:
diff --git a/docs/tz.rst b/docs/tz.rst
index f0f2b21..5fd5bf5 100644
--- a/docs/tz.rst
+++ b/docs/tz.rst
@@ -1,6 +1,6 @@
-=====
+==
 tz
-=====
+==
 .. automodule:: dateutil.tz
    :members:
    :undoc-members:
diff --git a/docs/zoneinfo.rst b/docs/zoneinfo.rst
index 097e1a4..77c1eb2 100644
--- a/docs/zoneinfo.rst
+++ b/docs/zoneinfo.rst
@@ -1,6 +1,6 @@
-=====
+========
 zoneinfo
-=====
+========
 .. automodule:: dateutil.zoneinfo
    :members:
    :undoc-members: