port 2.4.2 changelog (#4599)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index b95df95..345c71e 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -12,6 +12,14 @@
   and :class:`~cryptography.hazmat.primitives.hashes.SHA512_256` when using
   OpenSSL 1.1.1.
 
+.. _v2-4-2:
+
+2.4.2 - 2018-11-21
+~~~~~~~~~~~~~~~~~~
+
+* Updated Windows, macOS, and ``manylinux1`` wheels to be compiled with
+  OpenSSL 1.1.0j.
+
 .. _v2-4-1:
 
 2.4.1 - 2018-11-11