Start new release cycle
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0c9c73b..55cd459 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -4,9 +4,18 @@
 Versions follow `CalVer <http://calver.org>`_ with a strict backwards compatibility policy.
 The third digit is only for regressions.
 
+Changes for the upcoming release can be found in the `"changelog.d" directory <https://github.com/python-attrs/attrs/tree/master/changelog.d>`_ in our repository.
+
+..
+   Do *NOT* add changelog entries here!
+
+   This changelog is managed by towncrier and is compiled at release time.
+
+   See http://www.attrs.org/en/latest/contributing.html#changelog for details."""  # noqa
 
 .. towncrier release notes start
 
+
 17.3.0 (2017-11-08)
 -------------------
 
diff --git a/src/attr/__init__.py b/src/attr/__init__.py
index dddfad5..ee0bf75 100644
--- a/src/attr/__init__.py
+++ b/src/attr/__init__.py
@@ -29,7 +29,7 @@
 from . import validators
 
 
-__version__ = "17.3.0"
+__version__ = "17.4.0.dev0"
 
 __title__ = "attrs"
 __description__ = "Classes Without Boilerplate"