diff --git a/docs/releases.rst b/docs/releases.rst
index 8fb67c8e..3a9ef777 100644
--- a/docs/releases.rst
+++ b/docs/releases.rst
@@ -4,6 +4,7 @@ Release notes
 .. toctree::
    :maxdepth: 2
 
+   releases/v4.5.2
    releases/v4.5.1
    releases/v4.5.0
    releases/v4.4.3
diff --git a/docs/releases/v4.5.2.rst b/docs/releases/v4.5.2.rst
new file mode 100644
index 00000000..5eb93c6e
--- /dev/null
+++ b/docs/releases/v4.5.2.rst
@@ -0,0 +1,10 @@
+What's new in Tornado 4.5.2
+===========================
+
+Aug 27, 2017
+------------
+
+Bug Fixes
+~~~~~~~~~
+
+- Tornado now sets the ``FD_CLOEXEC`` flag on all file descriptors it creates. This prevents hanging client connections and resource leaks when the `tornado.autoreload` module (or ``Application(debug=True)``) is used.
diff --git a/setup.py b/setup.py
index c65e25d6..66d846be 100644
--- a/setup.py
+++ b/setup.py
@@ -103,7 +103,7 @@ http://api.mongodb.org/python/current/installation.html#osx
 
 kwargs = {}
 
-version = "4.5.1"
+version = "4.5.2"
 
 with open('README.rst') as f:
     kwargs['long_description'] = f.read()
diff --git a/tornado/__init__.py b/tornado/__init__.py
index f054e402..3eaa57b8 100644
--- a/tornado/__init__.py
+++ b/tornado/__init__.py
@@ -25,5 +25,5 @@ from __future__ import absolute_import, division, print_function
 # is zero for an official release, positive for a development branch,
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
-version = "4.5.1"
-version_info = (4, 5, 1, 0)
+version = "4.5.2"
+version_info = (4, 5, 2, 0)